Links doesn't work on simple drop menu - html

Question

I am stuck with a drop down menu that example I found at the following url : http://cssdeck.com/labs/another-simple-css3-dropdown-menu
The problem is with the hyper links, I tried to put <li><a href="#">about</></li> within the dropdown but it does not work like the cell over link.
Thanks for the help
body {
font-family: 'Lucida Grande', 'Helvetica Neue', Helvetica, Arial, sans-serif;
padding: 20px 50px 150px;
font-size: 13px;
text-align: center;
background: #E3CAA1;
}
ul {
text-align: left;
display: inline;
margin: 0;
padding: 15px 4px 17px 0;
list-style: none;
-webkit-box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
-moz-box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
}
ul li {
font: bold 12px/18px sans-serif;
display: inline-block;
margin-right: -4px;
position: relative;
padding: 15px 20px;
background: #fff;
cursor: pointer;
-webkit-transition: all 0.2s;
-moz-transition: all 0.2s;
-ms-transition: all 0.2s;
-o-transition: all 0.2s;
transition: all 0.2s;
}
ul li:hover {
background: #555;
color: #fff;
}
ul li ul {
padding: 0;
position: absolute;
top: 48px;
left: 0;
width: 150px;
-webkit-box-shadow: none;
-moz-box-shadow: none;
box-shadow: none;
display: none;
opacity: 0;
visibility: hidden;
-webkit-transiton: opacity 0.2s;
-moz-transition: opacity 0.2s;
-ms-transition: opacity 0.2s;
-o-transition: opacity 0.2s;
-transition: opacity 0.2s;
}
ul li ul li {
background: #555;
display: block;
color: #fff;
text-shadow: 0 -1px 0 #000;
}
ul li ul li:hover { background: #666; }
ul li:hover ul {
display: block;
opacity: 1;
visibility: visible;
}
<ul><li>Home</li>
<li>About</li>
<li>
Portfolio
<ul>
<li>Web Design</li>
<li>Web Development</li>
<li>Illustrations</li>
</ul>
</li>
<li>Blog</li>
<li>Contact</li>
</ul>

Answer 1

<ul><li>Home</li>
<li>About</li>
<li>Portfolio<ul>
<li>Web Design</li>
<li>Web Development</li>
<li>Illustrations</li>
</ul>
</li>
<li>Blog</li>
<li>Contact</li>
</ul>
try something like this i changed <li>About</li> You forgot to close </a>
EDIT:
add this to your css file. If this is what you mean
a{
text-decoration:none;
color:#fff;
}