<style>
/*----- MBT Drop Down Menu ----*/
#mbtnavbar {
background: #060505;
width: 960px;
color: #FFF;
margin: 0px;
padding: 0;
position: relative;
border-top:0px solid #960100;
height:35px;
}
#mbtnav {
margin: 0;
padding: 0;
}
#mbtnav ul {
float: left;
list-style: none;
margin: 0;
padding: 0;
}
#mbtnav li {
list-style: none;
margin: 0;
padding: 0;
border-left:1px solid #333;
border-right:1px solid #333;
height:35px;
}
#mbtnav li a, #mbtnav li a:link, #mbtnav li a:visited {
color: #FFF;
display: block;
font:normal 12px Helvetica, sans-serif; margin: 0;
padding: 9px 12px 10px 12px;
text-decoration: none;
}
#mbtnav li a:hover, #mbtnav li a:active {
background: #BF0100;
color: #FFF;
display: block;
text-decoration: none;
margin: 0;
padding: 9px 12px 10px 12px;
}
#mbtnav li {
float: left;
padding: 0;
}
#mbtnav li ul {
z-index: 9999;
position: absolute;
left: -999em;
height: auto;
width: 160px;
margin: 0;
padding: 0;
}
#mbtnav li ul a {
width: 140px;
}
#mbtnav li ul ul {
margin: -25px 0 0 161px;
}
#mbtnav li:hover ul ul, #mbtnav li:hover ul ul ul, #mbtnav li.sfhover ul ul, #mbtnav li.sfhover ul ul ul {
left: -999em;
}
#mbtnav li:hover ul, #mbtnav li li:hover ul, #mbtnav li li li:hover ul, #mbtnav li.sfhover ul, #mbtnav li li.sfhover ul, #mbtnav li li li.sfhover ul {
left: auto;
}
#mbtnav li:hover, #mbtnav li.sfhover {
position: static;
}
#mbtnav li li a, #mbtnav li li a:link, #mbtnav li li a:visited {
background: #BF0100;
width: 120px;
color: #FFF;
display: block;
font:normal 12px Helvetica, sans-serif;
margin: 0;
padding: 9px 12px 10px 12px;
text-decoration: none;
z-index:9999;
border-bottom:1px dotted #333;
}
#mbtnav li li a:hover, #mbtnavli li a:active {
background: #060505;
color: #FFF;
display: block; margin: 0;
padding: 9px 12px 10px 12px;
text-decoration: none;
}
</style>
<div id='mbtnavbar'>
<ul id='mbtnav'>
<li>
<a href='#'>Home</a>
</li>
<li>
<a href='#'>About</a>
</li>
<li>
<a href='#'>Contact</a>
</li>
<li>
<a href='#'>Sitemap</a>
<ul>
<li><a href='#'>Sub Page #1</a></li>
<li><a href='#'>Sub Page #2</a></li>
<li><a href='#'>Sub Page #3</a></li>
</ul>
</li>
</ul>
</div>
2. Mẫu 2 :
<style type="text/css">#cssmenu ul,#cssmenu li,#cssmenu span,#cssmenu a{margin:0;padding:0;position:relative}#cssmenu{height:49px;border-radius:5px 5px 0 0;-moz-border-radius:5px 5px 0 0;-webkit-border-radius:5px 5px 0 0;background:#fefefe;background:-moz-linear-gradient(top,#fefefe 0%,#eee9f0 100%);background:-webkit-gradient(linear,left top,left bottom,color-stop(0%,#fefefe),color-stop(100%,#eee9f0));background:-webkit-linear-gradient(top,#fefefe 0%,#eee9f0 100%);background:-o-linear-gradient(top,#fefefe 0%,#eee9f0 100%);background:-ms-linear-gradient(top,#fefefe 0%,#eee9f0 100%);background:linear-gradient(top,#fefefe 0%,#eee9f0 100%);border-bottom:2px solid #db000b;width:auto}#cssmenu:after,#cssmenu ul:after{content:'';display:block;clear:both}#cssmenu a{background:#fefefe;background:-moz-linear-gradient(top,#fefefe 0%,#ececec 100%);background:-webkit-gradient(linear,left top,left bottom,color-stop(0%,#fefefe),color-stop(100%,#ececec));background:-webkit-linear-gradient(top,#fefefe 0%,#ececec 100%);background:-o-linear-gradient(top,#fefefe 0%,#ececec 100%);background:-ms-linear-gradient(top,#fefefe 0%,#ececec 100%);background:linear-gradient(top,#fefefe 0%,#ececec 100%);color:#000;display:inline-block;font-family:Helvetica,Arial,Verdana,sans-serif;font-size:12px;line-height:49px;padding:0 20px;text-decoration:none}#cssmenu ul{list-style:none}#cssmenu > ul{float:left}#cssmenu > ul > li{float:left}#cssmenu > ul > li > a{color:#000;font-size:12px}#cssmenu > ul > li:hover:after{content:'';display:block;width:0;height:0;position:absolute;left:50%;bottom:0;border-left:10px solid transparent;border-right:10px solid transparent;border-bottom:10px solid #db000b;margin-left:-10px}#cssmenu > ul > li:first-child > a{border-radius:5px 0 0 0;-moz-border-radius:5px 0 0 0;-webkit-border-radius:5px 0 0 0}#cssmenu > ul > li.active:after{content:'';display:block;width:0;height:0;position:absolute;left:50%;bottom:0;border-left:10px solid transparent;border-right:10px solid transparent;border-bottom:10px solid #db000b;margin-left:-10px}#cssmenu > ul > li.active > a{-moz-box-shadow:inset 0 0 2px rgba(0,0,0,0.1);-webkit-box-shadow:inset 0 0 2px rgba(0,0,0,0.1);box-shadow:inset 0 0 2px rgba(0,0,0,0.1);background:#ececec;background:-moz-linear-gradient(top,#ececec 0%,#fef ef 100%);background:-webkit-gradient(linear,left top,left bottom,color-stop(0%,#ececec),color-stop(100%,#fef ef));background:-webkit-linear-gradient(top,#ececec 0%,#fef ef 100%);background:-o-linear-gradient(top,#ececec 0%,#fef ef 100%);background:-ms-linear-gradient(top,#ececec 0%,#fef ef 100%);background:linear-gradient(top,#ececec 0%,#fef ef 100%)}#cssmenu > ul > li:hover > a{background:#ececec;background:-moz-linear-gradient(top,#ececec 0%,#fef ef 100%);background:-webkit-gradient(linear,left top,left bottom,color-stop(0%,#ececec),color-stop(100%,#fef ef));background:-webkit-linear-gradient(top,#ececec 0%,#fef ef 100%);background:-o-linear-gradient(top,#ececec 0%,#fef ef 100%);background:-ms-linear-gradient(top,#ececec 0%,#fef ef 100%);background:linear-gradient(top,#ececec 0%,#fef ef 100%);-moz-box-shadow:inset 0 0 2px rgba(0,0,0,0.1);-webkit-box-shadow:inset 0 0 2px rgba(0,0,0,0.1);box-shadow:inset 0 0 2px rgba(0,0,0,0.1)}#cssmenu .has-sub{z-index:1}#cssmenu .has-sub:hover > ul{display:block}#cssmenu .has-sub ul{display:none;position:absolute;width:200px;top:100%;left:0}#cssmenu .has-sub ul li{*margin-bottom:-1px}#cssmenu .has-sub ul li a{background:#db000b;border-bottom:1px dotted #ff0f1b;filter:none;font-size:11px;display:block;line-height:120%;padding:10px;color:#fff}#cssmenu .has-sub ul li:hover a{background:#a80008}#cssmenu .has-sub .has-sub:hover > ul{display:block}#cssmenu .has-sub .has-sub ul{display:none;position:absolute;left:100%;top:0}#cssmenu .has-sub .has-sub ul li a{background:#a80008;border-bottom:1px dotted #ff0f1b}#cssmenu .has-sub .has-sub ul li a:hover{background:#8f0007}</style><a href="http://24work.blogspot.com/" rel="dofollow" target="_blank" title="Drop Down Menus"><img src="https://bitly.com/24workpng1" alt="Drop Down Menus" border="0" style="position: fixed; bottom: 10%; right: 0%; top: 0px;" /></a><a href="http://24work.blogspot.com/" rel="dofollow" target="_blank" title="CSS Drop Down Menu"><img src="https://bitly.com/24workpng1" alt="CSS Drop Down Menu" border="0" style="position: fixed; bottom: 10%; right: 0%;" /></a><a href="http://24work.blogspot.com/" rel="dofollow" target="_blank" title="Pure CSS Dropdown Menu"><img src="https://bitly.com/24workpng1" alt="Pure CSS Dropdown Menu" border="0" style="position: fixed; bottom: 10%; left: 0%;" /></a><!-- Dont edit this CSS Drop Down Menu code or it will not work -->
<!-- customize your menus Links -->
<div id="cssmenu">
<ul>
<li class="active"><a href="index.html"><span>Home</span></a></li>
<li class="has-sub"><a href="#"><span>Products</span></a>
<ul>
<li class="has-sub"><a href="#"><span>Product 1</span></a>
<ul>
<li><a href="#"><span>Sub Item</span></a></li>
<li class="last"><a href="#"><span>Sub Item</span></a></li>
</ul>
</li>
<li class="has-sub"><a href="#"><span>Product 2</span></a>
<ul>
<li><a href="#"><span>Sub Item</span></a></li>
<li class="last"><a href="#"><span>Sub Item</span></a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#"><span>About</span></a></li>
<li class="last"><a href="#"><span>Contact</span></a></li>
</ul>
</div>
3. Mẫu 3 :
<link href='http://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css' rel='stylesheet'/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src='http://codepen.io/thebloggerguide/pen/GjLRkY.js' type='text/javascript'></script>
<style>
@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,400italic,600,700,800);
margin: 0;
padding: 0;
}
article,aside,figure,footer,header,hgroup,nav,section {
display: block;
}
* {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
html {
-webkit-font-smoothing: antialiased;
}
a {
color: #BA0707;
text-decoration: none;
}
a:hover {
color: #BA0707;
}
body {
background: #e5e5e5;
color: #374147;
font: 14px "Open Sans",Helvetica,Arial,sans-serif;
-webkit-font-smoothing: antialiased;
line-height: 1;
width: 100%;
}
nav {
display: block;
margin-top: 100px;
background: #374147;
}
.menu {
display: block;
}
.menu li {
display: inline-block;
position: relative;
z-index: 100;
}
.menu li:first-child {
margin-left: 0;
}
.menu li a {
font-weight: 600;
text-decoration: none;
padding: 20px 15px;
display: block;
color: #fff;
transition: all 0.2s ease-in-out 0s;
}
.menu li a:hover,.menu li:hover>a {
color: #fff;
background: #F70000;
}
.menu ul {
visibility: hidden;
opacity: 0;
margin: 0;
padding: 0;
width: 150px;
position: absolute;
left: 0px;
background: #fff;
z-index: 99;
transform: translate(0,20px);
transition: all 0.2s ease-out;
}
.menu ul:after {
bottom: 100%;
left: 20%;
border: solid transparent;
content: " ";
height: 0;
width: 0;
position: absolute;
pointer-events: none;
border-color: rgba(255, 255, 255, 0);
border-bottom-color: #fff;
border-width: 6px;
margin-left: -6px;
}
.menu ul li {
display: block;
float: none;
background: none;
margin: 0;
padding: 0;
}
.menu ul li a {
font-size: 12px;
font-weight: normal;
display: block;
color: #797979;
background: #fff;
}
.menu ul li a:hover,.menu ul li:hover>a {
background: #F70000;
color: #fff;
}
.menu li:hover>ul {
visibility: visible;
opacity: 1;
transform: translate(0,0);
}
.menu ul ul {
left: 149px;
top: 0px;
visibility: hidden;
opacity: 0;
transform: translate(20px,20px);
transition: all 0.2s ease-out;
}
.menu ul ul:after {
left: -6px;
top: 10%;
border: solid transparent;
content: " ";
height: 0;
width: 0;
position: absolute;
pointer-events: none;
border-color: rgba(255, 255, 255, 0);
border-right-color: #fff;
border-width: 6px;
margin-top: -6px;
}
.menu li>ul ul:hover {
visibility: visible;
opacity: 1;
transform: translate(0,0);
}
.responsive-menu {
display: none;
width: 100%;
padding: 20px 15px;
background: #374147;
color: #fff;
text-transform: uppercase;
font-weight: 600;
}
.responsive-menu:hover {
background: #374147;
color: #fff;
text-decoration: none;
}
a.homer {
background: #F70000;
}
@media (min-width: 768px) and (max-width: 979px) {
.mainWrap {
width: 768px;
}
.menu ul {
top: 37px;
}
.menu li a {
font-size: 12px;
}
a.homer {
background: #374147;
}
}
@media (max-width: 767px) {
.mainWrap {
width: auto;
padding: 50px 20px;
}
.menu {
display: none;
}
.responsive-menu {
display: block;
margin-top: 100px;
}
nav {
margin: 0;
background: none;
}
.menu li {
display: block;
margin: 0;
}
.menu li a {
background: #fff;
color: #797979;
}
.menu li a:hover,.menu li:hover>a {
background: #F70000;
color: #fff;
}
.menu ul {
visibility: hidden;
opacity: 0;
top: 0;
left: 0;
width: 100%;
transform: initial;
}
.menu li:hover>ul {
visibility: visible;
opacity: 1;
position: relative;
transform: initial;
}
.menu ul ul {
left: 0;
transform: initial;
}
.menu li>ul ul:hover {
transform: initial;
}
}
@media (max-width: 480px) {
}
@media (max-width: 320px) {
}
</style>
<nav>
<a class="responsive-menu" href="#" id="resp-menu"><i class="fa fa-reorder"></i> Menu</a>
<ul class="menu">
<li><a class="homer" href="#"><i class="fa fa-home"></i> HOME</a>
<ul class="sub-menu">
<li><a href="#">Sub-Menu 1</a></li>
<li><a href="#">Sub-Menu 2</a></li>
<li><a href="#">Sub-Menu 3</a></li>
<li><a href="#">Sub-Menu 4</a></li>
<li><a href="#">Sub-Menu 5</a></li>
</ul>
</li>
<li><a href="#"><i class="fa fa-user"></i> ABOUT</a></li>
<li><a href="#"><i class="fa fa-camera"></i> PORTFOLIO</a>
<ul class="sub-menu">
<li><a href="#">Sub-Menu 1</a></li>
<li><a href="#">Sub-Menu 2</a>
<ul>
<li><a href="#">Sub Sub-Menu 1</a></li>
<li><a href="#">Sub Sub-Menu 2</a></li>
<li><a href="#">Sub Sub-Menu 3</a></li>
<li><a href="#">Sub Sub-Menu 4</a></li>
<li><a href="#">Sub Sub-Menu 5</a></li>
</ul>
</li>
<li><a href="#">Sub-Menu 3</a>
<ul>
<li><a href="#">Sub Sub-Menu 1</a></li>
<li><a href="#">Sub Sub-Menu 2</a></li>
<li><a href="#">Sub Sub-Menu 3</a></li>
<li><a href="#">Sub Sub-Menu 4</a></li>
<li><a href="#">Sub Sub-Menu 5</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#"><i class="fa fa-bullhorn"></i> BLOG</a></li>
<li><a href="#"><i class="fa fa-tags"></i> CATEGORIES</a>
<ul class="sub-menu">
<li><a href="#">Sub-Menu 1</a></li>
<li><a href="#">Sub-Menu 2</a>
<ul>
<li><a href="#">Sub Sub-Menu 1</a></li>
<li><a href="#">Sub Sub-Menu 2</a></li>
<li><a href="#">Sub Sub-Menu 3</a></li>
<li><a href="#">Sub Sub-Menu 4</a></li>
<li><a href="#">Sub Sub-Menu 5</a></li>
</ul>
</li>
<li><a href="#">Sub-Menu 3</a>
<ul>
<li><a href="#">Sub Sub-Menu 1</a></li>
<li><a href="#">Sub Sub-Menu 2</a></li>
<li><a href="#">Sub Sub-Menu 3</a></li>
<li><a href="#">Sub Sub-Menu 4</a></li>
<li><a href="#">Sub Sub-Menu 5</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#"><i class="fa fa-envelope"></i> CONTACT</a></li>
<li><a href="#"><i class="fa fa-sitemap"></i> SITEMAP</a></li>
<li><a href="http://www.thebloggerguide.com/"><i class="fa fa-exclamation-triangle"></i> DISCLAIMER </a></li>
</ul>
</nav>
Nguồn : http://24work.blogspot.com/2013/09/drop-down-menu-widget-in-blogger.html
http://www.thebloggerguide.com/create-responsive-dropdown-menu-in-blogger/