public function render(Varien_Object $row) { $brandThumbnailImage = $row->getThumbnailImage(); if ($brandThumbnailImage) { $path = 'brands' . DS . 'thumbnail' . DS . $row->getId(); $img = Mage::helper('shopbybrand/image')->init($row, $path)->resizeThumbnail(100, 75); return '<img src=' . $img . ' />'; } return ''; }