function smarty_function_sorter($params, &$smarty)
{
    $string = $params['text'];
    $id = $params['id'];
    $sort = $params['sort'];
    $sorter = new Sorter($id);
    return $sorter->header($string, $sort);
}
/**
 * Smarty sorter header modifier plugin
 *
 * Type:     modifier<br>
 * Name:     price<br>
 * Purpose:  convert string to sorter header
 * @param string
 * @return string
 */
function smarty_modifier_sorter($string, $id)
{
    $sorter = new Sorter($id);
    return $sorter->header($string);
}