<?php 
/* 
 * Smarty plugin 
 * ------------------------------------------------------------- 
 * File:     modifier.rewrite_url.php 
 * Type:     modifier 
 * Name:     rewrite_url 
 * ------------------------------------------------------------- 
 */ 
function smarty_modifier_rewrite_url($url) 
{ 
    //do your rewrite 
    return $url; 
} 
?>