Selected Menu in WordPress dynamic menu

Hi guys,

I am using the following code to generate menu from the WordPress categories. The menu is dynamic based on the built created categories.

<ul class="menu clearfix">
	<?php
		# Navigation Taxonomy Menu ---> so dynamic it's unbelievable!
		$mylinks = get_terms('category', array(
			'parent' => 0,				# display parent category links only
			'orderby' => 'name',
			'hide_empty' => 0
			)
		);
		$count = count($mylinks);

		if ( $count > 0 ) {				# From the above, we create a menu
			foreach ( $mylinks as $mylink ) {
				echo '<li class="page_item">';
				# get current webdirectory and link to taxonomy menus
				echo '<a href=' . network_site_url() . '/' . $mylink->slug . ' class="'. $mylink->slug .'" >';
				echo $mylink->name;
				echo "</a>";
				echo "</li>";
				}
			}
	?>
</ul>

The thing however is, although the menu works fine, I cannot set active/selected menus.

Err, how will I go about doing that? Say add a class to an active or selected menu?