输出方法：
{volist name=":getArray(fun('Sort@son',intval($fid))?:fun('Sort@brother',$fid))" id="name"}
<li {eq name="$key" value="$fid"}class='ck'{/eq}><a href="{:urls('content/index',"fid=$key")}">{$name}</a></li>
{/volist}
结果：

if (!function_exists('get_sort')) {

    /**
     * 获取具体某个频道下面的栏目相关信息
     * @param number $id 为0时，取出所有栏目，大于0时，根据$type参数取值
     * @param string $field 取某个字段对应的值,config或者是不存在的字段名,则取出所有配置参数
     * @param string $type father时取出所有父级栏目,sons时取出所有下一级栏目,other时优先取子栏目,若无再取同级,若无再取父级兄弟栏目
     * @param string $sys_type 指定频道模块
     * @return void|number|number[]|array[]|unknown[]|number[]|unknown[]|array|unknown
     */
    function get_sort($id = 0, $field = 'name', $type = '', $sys_type = '')
    {
        $array = sort_config($sys_type);
        $_type = $type === '' ? $field : $type;   //兼容处理
        if ($id > 0) {
            if ($_type == 'father') {    //所有父栏目，也包括自身,一般用在面包屑导航
                $farray = sort_get_father($id, $sys_type);
                $self_array = [$id => $array[$id]['name']];
                return empty($farray) ? $self_array : $farray + $self_array;
            } elseif ($_type == 'sons') {  //所有下一级级栏目，也包括自身，一般用在查询数据库
                $s_array = [
                    $id => $field == 'name' ? $array[$id]['name'] : $id,
                ];
                $_pid = 0;
                $fpid = [];     //把所有父分类都加入到容器
                foreach ($array as $key => $rs) {
                    if (!$rs['pid']) continue;
                    //$rs['pid']==$id 仅仅第一层直属下级, $rs['pid']==$_pid 下级的下级
                    if ($rs['pid'] == $id || $rs['pid'] == $_pid || in_array($rs['pid'], $fpid)) {
                        $s_array[$key] = $field == 'name' ? $array[$key]['name'] : $key;
                        if (!in_array($rs['pid'], $fpid)) {   //把所有父分类都加入容器
                            $fpid[] = $rs['pid'];
                        }
                        $_pid = $key;
                    }
                }
                return $s_array;
            } elseif ($_type == 'brother') {  //取同级栏目
                $s_array = [];
                $_pid = $array[$id]['pid'];
                foreach ($array as $key => $rs) {
                    if ($rs['pid'] == $_pid) {
                        $s_array[$key] = $rs['name'];
                    }
                }
                return $s_array;
            } elseif ($_type == 'other') {    //取父级兄弟栏目及本级兄弟栏目及子栏目，一般用在栏目页面方便展示布局
                $m_array = [];
                $pid = $array[$id]['pid'];
                $fpid = $pid ? $array[$pid]['pid'] : null;
                $_pid = null;
                foreach ($array as $key => $rs) {
                    if ($fpid !== null && $rs['pid'] == $fpid) {  //父级栏目
                        $m_array[$key] = $rs['name'];
                    } elseif ($rs['pid'] == $pid) {   //同级栏目
                        $m_array[$key] = $rs['name'];
                    } elseif ($rs['pid'] == $_pid) {    //子栏目
                        $m_array[$key] = $rs['name'];
                    }
                    if ($key == $id) {
                        $_pid = $id;
                    }
                }
                return $m_array;
            } elseif ($_type == 'config') {
                return $array[$id];
            } elseif (isset($array[$id][$_type])) {
                return $array[$id][$_type];
            } else {
                return $array[$id];
            }
        } elseif ($_type == 'other' && $array) {  //fid不存在的话,就只取一级栏目
            $farray = [];
            foreach ($array as $key => $rs) {
                if ($rs['pid'] == 0) {
                    $farray[$key] = $rs['name'];
                }
            }
            return $farray;
        } elseif ($_type == 'all') {
            $farray = [];
            foreach ($array as $key => $rs) {
                $farray[$key] = $rs['name'];
            }
            return $farray;
        }
        return $array;
    }
}