Показ рекламных банеров в каталоге товаров (интернет-магазин)

<xsl:template match="shop_item">
   <!-- тут разметка товара -->
   <xsl:if test="position() mod 2 = 0">
      <!-- тут баннер -->
   </xsl:if>
</xsl:template>

$Advertisement_Controller_Show = new Advertisement_Controller_Show(
        Core_Entity::factory('Advertisement', 1)
);
$Shop_Controller_Show->addEntity(
    $Advertisement_Controller_Show
        
);  

<script type="text/javascript">
   var flashvars16 = {};
   var params16 = {flashvars: "link1=/ad/showbanner/?id=2630424",quality: "high",wmode: "opaque"};
   var attributes16 = {};
   swfobject.embedSWF("/upload/img/banner_16.swf", "AdTopContainer16", "100%", "90", "7.0.0", "/js/expressInstall.swf", flashvars16, params16, attributes16);
</script>
<div id="AdTopContainer16"></div>