Here is my html
<ul class="nav">
<li><a href="#">Furniture</a>
<div class="container-4">
<div class="col1">
<h3>Living Room</h3>
<ul>
<li><a href="#">Sofa-Loveseat</a></li>
<li><a href="#">Coffee-End Tables</a></li>
<li><a href="#">TV-Media Units</a></li>
<li><a href="#">Living Room Sets</a></li>
</ul>
</div>
<div class="col1">
<h3>Bedroom</h3>
<ul>
<li><a href="#">Beds</a></li>
<li><a href="#">Storage</a></li>
<li><a href="#">Dresseing Tables</a></li>
<li><a href="#">Test Item 1</a></li>
<li><a href="#">Test Item 2</a></li>
</ul>
</div>
<div class="col1">
<h3>Dining Room</h3>
<ul>
<li><a href="#">Ding Tables</a></li>
<li><a href="#">Dining Chairs</a></li>
<li><a href="#">Dining Sets</a></li>
<li><a href="#">Test Item 1</a></li>
<li><a href="#">Test Item 2</a></li>
</ul>
</div>
<div class="col1">
<h3>Bathroom</h3>
<ul>
<li><a href="#">Bathroom Furniture</a></li>
<li><a href="#">Item 2</a></li>
<li><a href="#">Item 3</a></li>
<li><a href="#">Item 4</a></li>
</ul>
</div>
<div class="col4 highlighted">
<h3>Whatever I want to say here</h3>
<p>Whatever they need to do</p>
</div>
<div class="col1">
<h3>Baby-Todler Rooms</h3>
<ul>
<li><a href="#">Beds</a></li>
<li><a href="#">Storage</a></li>
<li><a href="#">Item 3</a></li>
<li><a href="#">Item 4</a></li>
</ul>
</div>
<div class="col1">
<h3>Other Furniture</h3>
<ul>
<li><a href="#">Item 1</a></li>
<li><a href="#">Item 2</a></li>
<li><a href="#">Item 3</a></li>
</ul>
</div>
<div class="col2">
<h3>Decoration</h3>
<ul>
<li><a href="#">Item 1</a></li>
<li><a href="#">Item 2</a></li>
<li><a href="#">Item 3</a></li>
<li><a href="#">Item 4</a></li>
</ul>
</div>
<div class="col4 highlighted">
<h3>Do not miss our Outdoor Furniture deals!</h3>
<p>10% OFF on every outdoor furniture item</p>
</div>
</div>
</li>
<li><a href="#">Lighting</a></li>
<li><a href="#">Textiles-Rugs</a></li>
<li>
<a href="#">Office Furniture</a>
<div class="container-1 right">
</div>
</li>
<li><a href="#">Storage Units</a></li>
<li><a href="#">Last Item</a></li>
</ul>
and css
* { -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; padding: 0; margin: 0;}
body { font-family: "PT Sans", sans-serif; background: #f5f5f5; font-size: 100%;}
a { color: #666; text-decoration: none;}
.nav {
background: #666;
border-radius: 3px;
width: 960px;
margin: 20px auto;
height: 43px;
}
.nav li { list-style: none; }
.nav > li { padding: 0; float: left; position: relative; }
.nav > li > a {
float: left;
color: #fff;
font-size: 13px;
text-decoration: none;
line-height: 43px;
padding: 0 20px;
border-right: 1px solid #777;
border-left: 1px solid #555;
height: 43px;
}
.nav > li:hover > a { background: #555; border-right: 1px solid #666; }
.nav > li:first-child > a { border-left: 0; }
.nav > li:last-child > a { border-right: 0; }
.nav > li:hover > div { }
/* MEGA DROP DOWN */
.nav > li > div {
position: absolute;
left: 0;
top: 43px;
display: none;
background: #fff;
padding: 10px 10px;
box-shadow: 0 2px 3px rgba(0,0,0,0.1);
overflow: hidden;
}
.nav > li > div p { color: #666; }
.nav > li > div.right { right: 0; left: auto }
.container-1, .container-2, .container-3, .container-4 { font-size: 80%; }
/* COLUMNS */
.col1,.col2,.col3,.col4,.col5 { margin: 10px 0; float: left; padding: 0 10px;}
/* 1 Column */
.container-1 { width: 170px; }
.container-1 .col1 { width: 100%; }
/* 2 Column */
.container-2 { width: 270px; }
.container-2 .col1 { width: 50% }
.container-2 .col2 { width: 100% }
/* 3 Column */
.container-3 { width: 400px; }
.container-3 .col1 { width: 33.33% }
.container-3 .col2 { width: 66.66% }
.container-3 .col3 { width: 100% }
/* 4 Column */
.container-4 { width: 500px; }
.container-4 .col1 { width: 25%; }
.container-4 .col2 { width: 50% }
.container-4 .col3 { width: 75% }
.container-4 .col4 { width: 100% }
/* 5 Column */
.container-5 { width: 600px; }
.container-5 .col1 { width: 20%; }
.container-5 .col2 { width: 40% }
.container-5 .col3 { width: 60% }
.container-5 .col4 { width: 80% }
.container-5 .col5 { width: 100% }
/* HIGHLIGHTS */
.container-3 .highlighted {
width: 400px;
;
padding: 20px;
background: #e4fbff;
border-top: 1px solid #ddd;
border-bottom: 1px solid #ddd;
}
.container-4 .highlighted {
width: 500px;
;
padding: 20px;
background: #e4fbff;
border-top: 1px solid #ddd;
border-bottom: 1px solid #ddd;
}
.clearfix:after {
content: ".";
display: block;
height: 0;
clear: both;
visibility: hidden;
}
and javascript
$('.nav > li').hover(function(){
$(this).find('.container-4').stop().slideDown('fast');
},
function(){
$(this).find('.container-4').stop().slideUp('slow');
});