Wordpress: Menu de catégories horizontal

The php

The first thing we have to do is to use php to get or pages and subpages (or our categories/sub-categories). Paste the following code in the header.php file of your theme.

<ul id="nav2" class="clearfloat">
	<li><a href="<?php echo get_option('home'); ?>/" class="on">Home</a></li>
 	<?php wp_list_categories('orderby=name&exlude=181&title_li=');
 	$this_category = get_category($cat);
 	if (get_category_children($this_category->cat_ID) != "") {
 		echo "<ul>";
wp_list_categories('orderby=id&show_count=0&title_li=&use_desc_for_title=1&child_of='.$this_category->cat_ID);
 		echo "</ul>";
 	}
	?>
</ul>

The CSS

As usual, the CSS will control the look and feel of html elements, but it will also allows us to display only the sub-categories of the selected category. No Javascript is needed in this exemple, excepted if you want to ensure backward compatibility with Internet Explorer 6.

#nav2{
        background-color: #202020;
        display: block;
        font-size:1.1em;
        height:50px;
        width:100%;
}

#nav2, #nav2 ul {
	line-height: 1;
	list-style: none;
}

#nav2 a ,#nav2 a:hover{
	border:none;
	display: block;
	text-decoration: none;
}

#nav2 li {
	float: left;
	list-style:none;
}

#nav2 a,#nav2 a:visited {
	color:#109dd0;
	display:block;
	font-weight:bold;
	padding:6px 12px;
}

#nav2 a:hover, #nav2 a:active {
	color:#fff;
	text-decoration:none
}	

#nav2 li ul {
	border-bottom: 1px solid #a9a9a9;
	height: auto;
	left: -999em;
	position: absolute;
	width: 900px;
	z-index:999;
}

#nav2 li li {
	width: auto;
}

#nav2 li li a,#nav2 li li a:visited {
        color:#109dd0;
	font-weight:normal;
	font-size:0.9em;
}

#nav2 li li a:hover,#nav2 li li a:active {
	color:#fff;
}	

#nav2 li:hover ul, #nav2 li li:hover ul, #nav2 li li li:hover ul, #nav2 li.sfhover ul, #nav2 li li.sfhover ul, #nav2 li li li.sfhover ul {
	left: 30px;
}

Once you added the lines above to your stylesheet, you’ll have a modern, accessible and xhtml/css valid fancy menu. If you want to ensure backward compatibility with IE6, you’ll have to add this bit of Javascript:

<!--//--><![CDATA[//><!--

sfHover = function() {
	var sfEls = document.getElementById("nav2").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

//--><!]]>

Paste this script into an external file, or in the head section of your index.php file. Once done, your blog now have a fancy dropdown horitontal menu!