模板标签里面

组合筛选结果页，如何输入当前选中项的值？那个机械行业（下拉框）怎么输出？

<div>当前选中：<span>{dr_linkage('address', $params.diqu, 0, 'name')}</span><span>机械行业</span></div>

                        <div class="filter-t">地区：</div>
                        <div class="filter-d">
                            <ul class="clearfix">
                                <li><a class="{if !$params.diqu || dr_linkage('address', $params.diqu, 0, 'child')}active{/if}" href="{dr_search_url($params, 'diqu', NULL)}">不限</a></li>
                                {list action=linkage code=address pid=$params.diqu}
                                <li><a class="{if $t.id==$params.diqu}active{/if}" href="{dr_search_url($params, 'diqu', $t.id)}">{$t.name}</a></li>
                                {/list}
                            </ul>
                        </div>
                        <div class="filter-t">行业：</div>
                        <div class="filter-d">
                            <ul>
                                {php $field = dr_field_options(29);}
                                <li><a class="{if !$params.hangye}active{/if}" href="{dr_search_url($params, 'hangye', NULL)}">不限</a></li>
                                {loop $field $i $t}
                                <li><a class="{if $i==$params.hangye}active{/if}" href="{dr_search_url($params, 'hangye', $i)}">{$t}</a></li>
                                {/loop}
                            </ul>
                        </div>