Как добавить в ленту активности вывод фотографий к статьям? Инстант2

 
        $this->select('a.photo', 'art_photo');
        $this->join('con_articles', 'a', 'a.id = i.subject_id');
 
        $this->select('w.photo', 'video_photo');
        $this->join('con_watch', 'w', 'w.id = i.subject_id');
 

 
 $item['article'] = array(
                'id' => $item['subject_id'],
                'photo' => $item['art_photo']
            );
            $item['watch'] = array(
                'id' => $item['subject_id'],
                'photo' => $item['video_photo']
            );
 

 
<?php if (($item['type_id']) == 13 ){ ?> <?php echo html_image($item['article']['photo'],'big'); ?><?php } elseif  (($item['type_id']) == 21 ){ ?> <?php echo html_image($item['watch']['photo'],'big'); ?> <?php } ?>