örn :

#nav .current_page_item a, #nav .current_page_item a:visited{
color: #000000;
text-decoration: none;
}
#nav .page_item a{
color: #ffffff;
text-decoration: none;
background: #5c8d0c url(images/nav-button-bg.gif) repeat-x;
padding: 5px 15px;
font: bold 14px/100% Arial, Helvetica, sans-serif;
border-top: 1px solid #E6EED0;
border-left: 1px solid #AFCD69;
border-right: 1px solid #AFCD69;
display: block;
}
#nav .page_item a:hover {
color: #000000;
}

<ul id="nav">
<li class="page_item"><a href="<?php echo $website[url1]; ?>/Default.php" title="Home">Default Page</a></li>
<li class="page_item"><a href="<?php echo $website[url1]; ?>/index.php" title="Index/Of">Index / Of</a></li>
<li class="page_item"><a href="<?php echo $website[url1]; ?>/Contact.php" title="Contact">Contact</a></li>
<li class="page_item"><a href="#" title="Forums">Forums</a>
</ul>