public function list_skins()
    {
        $skins   = array();
        $skindir = INSTALL_PATH . 'skins/';

        foreach (glob($skindir . '*') as $path) {
            if (is_dir($path) && is_readable($path)) {
                $skins[] = substr($path, strlen($skindir));
            }
        }

        return $skins;
    }