protected function _getValue(Varien_Object $row)
 {
     $val = $row->getData($this->getColumn()->getIndex());
     $val = explode(',', $val);
     $valid = $row->getBannersliderId();
     $bannerdelcol = Mage::getModel('bannerslider/bannerslidergrouprelation')->getCollection()->addFieldToFilter('banner_id', $valid)->addFieldToSelect('group_id')->distinct(TRUE);
     $groupnameselectcollection = array();
     foreach ($bannerdelcol as $key => $singlebannerdelcol) {
         $groupid[] = $singlebannerdelcol->getGroupId();
     }
     $collection = Mage::getModel('bannerslider/bannerslidergroup')->getCollection()->addFieldToFilter('bannerslidergroup_id', array('in' => $groupid));
     $colsize = $collection->getSize();
     $coldata = $collection->getData();
     $i = 0;
     $out = '';
     foreach ($coldata as $singledata) {
         if ($colsize > 1) {
             if ($i < 1) {
                 $out .= $singledata['name'];
             } else {
                 $out .= "," . $singledata['name'];
             }
         } else {
             $out = $singledata['name'];
         }
         $i++;
     }
     if (empty($out)) {
         $out = "N/A";
     }
     return $out;
 }