<?php defined('SKYBLUE') or die('Bad file request'); 

global $Core;
global $Router;

$categories = get_portfolio_groups();
$pageId = Filter::get($_GET, 'pid');

?>
<ul id="sub-menu">
	<?php foreach ($categories as $cat) : ?>
	    <?php
	        $title = Filter::get($cat, 'title'); 
	        $link  = $Router->GetLink(
	            $pageId, 
	            array('-pg-' => $pageId, '-c' => $cat->id)
	        );
	        $class = "";
	        if (Filter::get($_GET, 'cid') == $cat->id) {
	            $class = ' class="active"';
	        }
	    ?>
	    <li><a href="<?php echo $link; ?>"<?php echo $class; ?>><?php echo $title; ?></a></li>
	<?php endforeach; ?>
</ul>