phpcms导航栏调用二级栏目

{pc:content action="category" catid="0" num="6" siteid="$siteid" order="listorder ASC"}
                    <ul class="sf-menu">
                        <li class='current'>
                            <a class="first-level" href="{siteurl($siteid)}"><strong>网站首页</strong></a>
                            <i></i>
                        </li>
                        {loop $data $v}
                        <li class="">
                            <a class="first-level" href="{$v[url]}"><strong>{$v[catname]}</strong></a>
                            <i></i>
                            
                            {if $v[arrchildid]} <!--是否有子栏目-->
                            {pc:content action="category" catid="$v[catid]" num="15" siteid="$siteid" order="listorder ASC" return="data2"}
                            <ul class="">
                                {loop $data2 $v}
                                <li class="">
                                    <a class="" href="{$v[url]}"><strong>{$v[catname]}</strong></a></i>
                                </li>
                                {/loop}
                            </ul>
                            {/pc}
                            {/if}
                        </li>
                        {/loop}
                        
                    </ul>
                    {/pc}