<ul id="blogmews">
  <li><a href="#">Home</a></li>
  <li><a href="#">About</a></li>
  <li>
    Topics
    <ul>
      <li><a href="#">Lifestyle</a></li>
      <li><a href="#">Blogging</a></li>
      <li><a href="#">Art and Design</a></li>
    </ul>
  </li>
  <li><a href="#">Portfolio</a></li>
  <li><a href="#">Contact</a></li>
</ul>
You will need to replace the # characters with the actual links of your pages, and the menu titles with your own. pages in Blogger? The text above in RED shows a menu title (“Topics”) with three sub-menu items that appear when you roll over it.To add additional menu items with sub-menus, you can copy the red portion of the code and paste a duplicate before or after any <li> or </li> codes, like so:
<ul id="icbabdrop">
  <li><a href="#">Home</a></li>
  <li><a href="#">About</a></li>
  <li>
    Topics
    <ul>
      <li><a href="#">Lifestyle</a></li>
      <li><a href="#">Blogging</a></li>
<li>
      <li><a href="#">Art and Design</a></li>     </ul>   </li>     Topics 2     <ul>
      <li><a href="#">Art and Design 2</a></li>
      <li><a href="#">Lifestyle 2</a></li>       <li><a href="#">Blogging 2</a></li>     </ul>   </li>
</ul>
<li><a href="#">Portfolio</a></li>
  <li><a href="#">Contact</a></li>
Now, you’ll want to pop on over to the Template > Customize page of Blogger and scroll down to Advanced > CSS. Add the following code to give that menu some style:
/* DROPDOWN MENU BY icanbuildablog.com */
.tabs-inner .widget ul#icbabdrop {
  margin: 0;
  text-align: left;
  display: inline;
  border:none;
  padding: 15px 4px 17px 0;   list-style: none; }
  font-family: sans-serif; /* Font for the menu */
.tabs-inner .widget ul#icbabdrop li {   font-size: 12px/18px;
  display: inline-block;
  position: relative;
  margin-right: -4px;   padding: 15px 20px;
  background: #fff; /* background colour of the main menu */
  float:none;
  cursor: pointer;
  -webkit-transition: all 0.2s;
  -moz-transition: all 0.2s;
  -o-transition: all 0.2s;
  -ms-transition: all 0.2s;   transition: all 0.2s; }
font-family: sans-serif; /* Font for the menu links */
.tabs-inner .widget ul#icbabdrop li a { padding:0;
border:0;
.tabs-inner .widget ul#icbabdrop li:hover {
}
  background: #555; /* background colour when you roll over a menu title */
  color: #fff; /* font colour when you roll over a menu title */
}
.tabs-inner .widget ul#icbabdrop li:hover a {
  background: transparent;
  color: #fff; /* font colour when you roll over a menu title link */
}
.tabs-inner .widget ul#icbabdrop li ul {
  z-index:1000;   border:none;
  top: 45px;
  padding: 0;   position: absolute;
  -webkit-box-shadow: none;
  left: 30px;   float:none;   width: 150px;
  display: none;
  -moz-box-shadow: none;   box-shadow: none;   opacity: 0;
  -moz-transition: opacity 0.2s;
  visibility: hidden;   -webkit-transiton: opacity 0.2s;
  -transition: opacity 0.2s;
  -ms-transition: opacity 0.2s;   -o-transition: opacity 0.2s; }
  background: #555; /* background colour of the sub menu items */
.tabs-inner .widget ul#icbabdrop li ul li {
  display: block;
  color: #fff; /* font colour of the sub menu items */
  text-shadow: 0 -1px 0 #000;
} ul#icbabdrop li ul li a{
  color:#fff  /* link colour of the sub menu items */
}
.tabs-inner .widget ul#icbabdrop li ul li:hover {
  background: #666; /* background colour when you roll over sub menu items */
}
.tabs-inner .widget ul#icbabdrop li:hover ul {
  display: block;   opacity: 1;
}
  visibility: visible;
You can change the colours and fonts wherever I’ve placed the comments in the code. If you want to center your menu as in the demo, just add: <center> before your HTML code in the gadget you added, and </center> at the end of it.