dedecms5.7织梦模板文章内容页如何调用关键词增加链接

{dede:field name='keywords' runphp='yes' }
                    if(!empty(@me))
                    {
                        $kws = explode(',',@me);
                        @me = "";
                        foreach($kws as $k)
                        {
                           @me .= "<a href='/plus/search.php?keyword=".urlencode($k)."' target=_blank ><h2>$k</h2></a> ";
                        }
                         @me= str_replace(' ', ' ',trim(@me));
                    }
 {/dede:field}