Sebelumnya,saya pernah membahas artikel tentang cara membuat menu dropdown.Kali ini saya akan membahas tentang menu dropdown yang akan diterapkan pada menu horizontal pada blog kalian.Langsung saja kepada tutornya

1. Login ke akun blogger anda
2. Tuju ke -> Rancangan --> Edit HTML.
3. Lalu taruh kode script berikut sebelum kode </head> 

 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></script> 

     4.Lalu Tambahkan Script Berikut dibawah kode script tadi:

<link rel="stylesheet" type="text/css" href="jqueryslidemenu.css" /> <!--[if lte IE 7]> <style type="text/css"> html .jqueryslidemenu{height: 1%;} /*Holly Hack for IE7 and below*/ </style><![endif]--> <script type="text/javascript" src="http://sites.google.com/site/amatullah83/js-indahnyaberbagi/Dropdownmenuwithjquery.js"></script>

     5.Kemudian tambahkan kode script berikut tepat diatas kode ]]></b:skin>

.jqueryslidemenu{
font: bold 12px Verdana;
background: #414141;
width: 100%;
}
.jqueryslidemenu ul{
margin: 0;
padding: 0;
list-style-type: none;
}
/*Top level list items*/
.jqueryslidemenu ul li{
position: relative;
display: inline;
float: left;
}
/*Top level menu link items style*/
.jqueryslidemenu ul li a{
display: block;
background: #414141; /*background of tabs (default state)*/
color: white;
padding: 8px 10px;
border-right: 1px solid #778;
color: #2d2b2b;
text-decoration: none;
}
* html .jqueryslidemenu ul li a{ /*IE6 hack to get sub menu links to behave correctly*/
display: inline-block;
}
.jqueryslidemenu ul li a:link, .jqueryslidemenu ul li a:visited{
color: white;
}
.jqueryslidemenu ul li a:hover{
background: black; /*tab link background during hover state*/
color: white;
}
/*1st sub level menu*/
.jqueryslidemenu ul li ul{
position: absolute;
left: 0;
display: block;
visibility: hidden;
}
/*Sub level menu list items (undo style from Top level List Items)*/
.jqueryslidemenu ul li ul li{
display: list-item;
float: none;
}
/*All subsequent sub menu levels vertical offset after 1st level sub menu */
.jqueryslidemenu ul li ul li ul{
top: 0;
}
/* Sub level menu links style */
.jqueryslidemenu ul li ul li a{
font: normal 13px Verdana;
width: 160px; /*width of sub menus*/
padding: 5px;
margin: 0;
border-top-width: 0;
border-bottom: 1px solid gray;
}
.jqueryslidemenuz ul li ul li a:hover{ /*sub menus hover style*/
background: #eff9ff;
color: black;
}
/* ######### CSS classes applied to down and right arrow images  ######### */
.downarrowclass{
position: absolute;
top: 12px;
right: 7px;
}
.rightarrowclass{
position: absolute;
top: 6px;
right: 5px;
}

    6.Terakhir tambahkan kode HTML berikut diatas <div id='header-wrapper'>

<div id="myslidemenu" class="jqueryslidemenu">
<ul>
<li><a href="http://amatullah83.blogspot.com/">Item 1</a></li>
<li><a href="#">Item 2</a></li>
<li><a href="#">Folder 1</a>
  <ul>
  <li><a href="#">Sub Item 1.1</a></li>
  <li><a href="#">Sub Item 1.2</a></li>
  <li><a href="#">Sub Item 1.3</a></li>
  <li><a href="#">Sub Item 1.4</a></li>
  </ul>
</li>
<li><a href="#">Item 3</a></li>
<li><a href="#">Folder 2</a>
  <ul>
  <li><a href="#">Sub Item 2.1</a></li>
  <li><a href="#">Folder 2.1</a>
    <ul>
    <li><a href="#">Sub Item 2.1.1</a></li>
    <li><a href="#">Sub Item 2.1.2</a></li>
    <li><a href="#">Folder 3.1.1</a>
        <ul>
            <li><a href="#">Sub Item 3.1.1.1</a></li>
            <li><a href="#">Sub Item 3.1.1.2</a></li>
            <li><a href="#">Sub Item 3.1.1.3</a></li>
            <li><a href="#">Sub Item 3.1.1.4</a></li>
            <li><a href="#">Sub Item 3.1.1.5</a></li>
        </ul>
    </li>
    <li><a href="#">Sub Item 2.1.4</a></li>
    </ul>
  </li>
  </ul>
</li>
<li><a href="http://amatullah83.blogspot.com/">Item 4</a></li>
</ul>
<br style="clear: left" />
</div>

Lalu klik save.

Semoga berhasil