Условие в шаблоне не срабатывает - ZOO

<?php
$category_id = JRequest::getInt('category_id');
if($category_id == '30'): ?>
<мой-код>
<?php endif; ?>

<?php
if($category->id == '30'): ?>
<мой-код>
<?php endif; ?>

<?php
/**
* @package   com_zoo
* @author    YOOtheme http://www.yootheme.com
* @copyright Copyright (C) YOOtheme GmbH
* @license   http://www.gnu.org/licenses/gpl.html GNU/GPL
*/

// no direct access
defined('_JEXEC') or die('Restricted access');

// include assets css/js
if (strtolower(substr($GLOBALS['app']->getTemplate(), 0, 3))!= 'yoo') {
	$this->app->document->addStylesheet('assets:css/reset.css');
}
$this->app->document->addStylesheet($this->template->resource.'assets/css/zoo.css');

$css_class = $this->application->getGroup().'-'.$this->template->name;



$category_id = JRequest::getInt('category_id');



?>


<div id="yoo-zoo" class="yoo-zoo <?php echo $css_class; ?> <?php echo $css_class.'-'.$this->item->alias; ?>">




<?php if ($category_id == '0')
echo "this category id  = $category_id";
?>




	<div class="item">
		<?php echo $this->renderer->render('item.full', array('view' => $this, 'item' => $this->item)); ?>
				
		<?php if ($this->application->isCommentsEnabled() && ($this->item->isCommentsEnabled() || $this->item->getCommentsCount(1))) : ?>
		<div class="feedback">
		
			<div class="box-t1">
				<div class="box-t2">
					<div class="box-t3"></div>
				</div>
			</div>
			
			<div class="box-1">
				<?php echo $this->app->comment->renderComments($this, $this->item); ?>
			</div>
			


			<div class="box-b1">
				<div class="box-b2">
					<div class="box-b3"></div>
				</div>
			</div>
		
		</div>
		<?php endif; ?>

	</div>

</div>

<?php elseif ($category_id == '30'): ?> и т.п.