Method sort

/**
 * Method to sort a column in a grid
 *
 * @param   string  $title          The link title
 * @param   string  $order          The order field for the column
 * @param   string  $direction      The current direction
 * @param   string  $selected       The selected ordering
 * @param   string  $task           An optional task override
 * @param   string  $new_direction  An optional direction for the new column
 * @param   string  $tip            An optional text shown as tooltip title instead of $title
 *
 * @return  string
 *
 * @since   1.5
 */
/*
 * GRID in frontend must be customized
 * because Joomla! takes "adminForm" as the only one name of form ??????????????????????????????????????????
 *
 */
public static function sort($title, $order, $direction = 'asc', $selected = 0, $task = null, $new_direction = 'asc', $tip = '', $form = '', $suffix = '')
{
    $direction = strtolower($direction);
    $icon = array('arrow-up-3', 'arrow-down-3');
    $index = (int) ($direction == 'desc');
    if ($order != $selected) {
        $direction = $new_direction;
    } else {
        $direction = $direction == 'desc' ? 'asc' : 'desc';
    }
    $html = '<a href="#" onclick="Joomla.tableOrderingPhoca(\'' . $order . '\',\'' . $direction . '\',\'' . $task . '\',\'' . $form . '\',\'' . $suffix . '\');return false;"' . ' class="hasTooltip" title="' . HTMLHelper::tooltipText($tip ? $tip : $title, 'JGLOBAL_CLICK_TO_SORT_THIS_COLUMN') . '">';
    if (isset($title['0']) && $title['0'] == '<') {
        $html .= $title;
    } else {
        $html .= Text::_($title);
    }
    if ($order == $selected) {
        $html .= ' <i class="icon-' . $icon[$index] . ' glyphicon glyphicon-' . $icon[$index] . '"></i>';
    }
    $html .= '</a>';
    return $html;
}