Не открыть страницу в аяксе

if ($do=='parent'){
if($_SERVER['HTTP_X_REQUESTED_WITH'] != 'XMLHttpRequest') { cmsCore::halt(); }
.........................
cmsCore::jsonOutput(array('error' => false, 'html' => ob_get_clean()));
}

<a data-title="" href="javascript:void(0)" onclick="parent.listCat('{$cat.url}','{$cat.id}', '{$cat.title}');return false;"><img class="" src="/templates/gallery/image/zoom3.png" alt=""></a>

	<a class="gallery-block" href="{$cat.url}-{$cat.id}.html" data-title="">
	<img class="" src="/templates/gallery/image/zoom3.png" alt=""></a>

$(function(){
  parent = {
    listCat: function(cat_url, cat_id, cat_title) {
      core.message(cat_title);
      $.post('/' +cat_url+ '-' +cat_id+ '.html', {}, function(data){
		if(data.error == false){
           core.alert(LANG_NO_CAT, LANG_ERROR);
		} 
      }, 'json');
    }
  }
});