【結貼】求一個PHP的正則表達式的寫法

<li class=""><a href="/admin/reimburse1?ref=addtabs" addtabs="131" url="/admin/reimburse1" py="dwsh" pinyin="danweishenhe"><i class="fa fa-circle-o fa-fw"></i> <span>單位審核</span> <span class="pull-right-container"> </span></a> </li><li class=""><a href="/admin/reimburse?ref=addtabs" addtabs="125" url="/admin/reimburse" py="fybx" pinyin="feiyongbaoxiao"><i class="fa fa-circle-o fa-fw"></i> <span>費用報銷</span> <span class="pull-right-container"> </span></a> </li>

需要提取出第一個<li class="">中的內容：

<li class=""><a href="/admin/reimburse1?ref=addtabs" addtabs="131" url="/admin/reimburse1" py="dwsh" pinyin="danweishenhe"><i class="fa fa-circle-o fa-fw"></i> <span>單位審核</span> <span class="pull-right-container"> </span></a> </li>

preg_match_all('/(<li class="">(.*?)<\/li>)/i', $str, $matches, PREG_PATTERN_ORDER);
    echo $matches[1][0];