Dropdown menu for Subcategories

[dailce]

Hi, I installed this contribution: http://addons.oscommerce.com/info/5351

 

Works fine, click a category and it will show all the products in the category including the subcategories.

 

However, at the top it shows a basic list of the subcategories. This is mainly in the code:

 

		<?php	
		if ($_GET['manufacturers_id'] == ''){
			if (isset($cPath)) {
					if (ereg('_', $cPath)) {
						$category_links = array_reverse($cPath_array);
						$cat_to_search = $category_links[0];
					}else {
						$cat_to_search = $cPath;
					}
				  // check to see if there are deeper categories within the current category			  
				   $categories_query = tep_db_query("select c.categories_id, cd.categories_name, c.categories_image, c.parent_id from " . TABLE_CATEGORIES . " c, " . TABLE_CATEGORIES_DESCRIPTION . " cd where c.parent_id = '" . $cat_to_search . "' and c.categories_id = cd.categories_id and cd.language_id = '" . $languages_id . "' order by sort_order, cd.categories_name");
					 if (tep_db_num_rows($categories_query) > 0 ) {
						 while ($categories = tep_db_fetch_array($categories_query)) {
								$cPath_new = tep_get_path($categories['categories_id']);
								echo '<a href="' . tep_href_link(FILENAME_DEFAULT, $cPath_new) . '">' . $categories['categories_name'] . '</a><br/>';
						}
					 }
				}	
		}else{
			echo '';
		}
		?>

 

 

How can I change the code above to have the links in a dropdown, and when the user changes an option in the dorpdown they are brought to the link?