protected function _option($value, $selected = false, $class = '', $label = '')
    {
        if ($selected === true) {
            $selected = ' selected="selected"';
        }

        $option = '<option value="' . $value . '" class="' . $class .  '"' . $selected .'>' .
                $this->_translate($label) .
            '</option>';

        return $option;
    }