public function render(Varien_Object $row) { $permissionIds = $row->getPermissionIds(); $permissionArray = explode(',', $permissionIds); $permissionSource = Mage::getSingleton('webpos/source_adminhtml_permission')->getOptionArray(); $permissionText = array(); foreach ($permissionArray as $permission) { if (isset($permissionSource[$permission])) { $permissionText[] = $permissionSource[$permission]; } } $result = implode(', ', $permissionText); echo $result; }