public function render(Varien_Object $row) { $sender = $row->getSender(); $str = ''; if (isset($sender['name'])) { $str .= htmlspecialchars($sender['name']) . ' '; } if ($sender['email']) { $str .= '[' . $sender['email'] . ']'; } if ($str == '') { $str .= '---'; } return $str; }