public function render(Varien_Object $row) { $status = $row->getLicenseStatus(); switch ($status) { case 'inactive': $class = 'critical'; break; case 'invalid': $class = 'major'; break; case 'expired': $class = 'minor'; break; case 'active': $class = 'notice'; break; default: $class = 'minor'; } return '<span class="grid-severity-' . $class . '"><span>' . $status . '</span></span>'; }