{list action=category pid=0 id=31}

                    {if $t.child}

                        {list action=category pid=$t.id return=t2}

                            <div class="depart_ulist left_fl">

                                <h3><a  target="_blank" href="{$t2.url}" >{$t2.name}</a></h3>

                                <ul>

                                {list action=module catid=$t2.id num=6 return=t3}

                                    <li><a  target="_blank" href="{$t3.url}">{$t3.title}</a><span>{dr_date($t3._updatetime, 'Y-m-d')}</span></li>

                                {/list}

                                </ul>

                            </div>

                         {/list}

                    {/if}

                {/list}