搜索页面这一段                                            

<!--这是来列出全部可以搜索的内容模块-->

                                            {php $top_search=[];}

                                            {cache name=module-content}

                                            {if $t.search}

                                            {php !$top_search && $top_search=$t;}

                                            <li  class="xz"><a href="javascript:dr_search_module_select('{$t.dirname}', '{$t.name}');"> {$t.name} </a></li>

                                            {/if}

                                            {/cache}

问题：想给选中的搜索模块加个class样式，怎么判断选中了当前模块?