public function currency($options = array())
    {
        $options = new AnConfig($options);

        $options->append(array(
            'name' => 'currency',
            'prompt' => true,
        ));

        $selected = $options->selected;
        unset($options->selected);
        $currencies = array_combine(self::$ISO_CURRENCY_SYMBOLS, self::$ISO_CURRENCY_SYMBOLS);

        return $this->_html->select($options->name, array('options' => $currencies, 'selected' => $selected), AnConfig::unbox($options));
    }