如何循环调用子栏目文章列表,实现DEDE如下代码：

                {dede:channelartlist row=7 typeid='5' }
                <ul>
                    {dede:arclist row='2' titlelen='50' channelid='' addfields='' flag='' isweight='' orderby='' orderway='' limit=''}
                    <li><a href="">文章标题</a></li>
                    {/dede:arclist}
                </ul>
                {/dede:channelartlist}