Постранично разбить вывод список категорий - Joomla 3.x: Общие вопросы

<?php

/**
 * @package		Joomla.Site
 * @subpackage	com_content
 * @copyright	Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
 * @license		GNU General Public License version 2 or later; see LICENSE.txt
 */

// no direct access
defined('_JEXEC') or die;
$class = ' class="first"';

$step = 10;
$cat_num=count($this->items[$this->parent->id]);
$page_num = ceil($cat_num / $step);

$stCatNum = 0;
$endCatNum = $step;

if (isset($_GET['page'])) 
   {
    $page = substr_replace($_GET['page'], '', -2, 2); 
    if ($page == '' or !ctype_digit($page) or $page > $page_num) 
	  {
	   unset($page);
	  }
    else {
	      $stCatNum =  $page*$step-$step;
          $endCatNum = $page*$step-1;
		 }
   } 
   
$x = 1;
$menu = '';  
while ($x <= $page_num and $page_num != 1)
{
$menu.= '<a href="'.
  substr_replace($_SERVER['REQUEST_URI'], '', 
  strpos($_SERVER['REQUEST_URI'], "?page", 0), 
  strpos($_SERVER['REQUEST_URI'], "ru", 0))
 .'?page='.$x.'ru"> >'.$x.' </a>';
$x++;
}



if (count($this->items[$this->parent->id]) > 0 && $this->maxLevelcat != 0) :
?>


<ul>
<?php foreach($this->items[$this->parent->id] as $id => $item) : 
	
	if ($id >= $stCatNum and $id <= $endCatNum ) :
	?>
    
	<li>
		<span class="item-title"><a href="<?php echo JRoute::_(ContentHelperRoute::getCategoryRoute($item->id));?>">
			<?php
			 			 echo $this->escape($item->title); 
			?></a>
		</span>
	</li>
    <?php endif; ?>

<?php endforeach; ?>
</ul>
<?php endif; ?>
<?php echo '<br>'.$menu ; ?>