value取值问题。有php

Question

<form action="javascript:searchGoods();" name="searchForm">    <ul style="list-style:none;width:100%;padding: 0;margin: 0;">        {foreach from=$sub_series item=sub}        <li  class="s{$sub.parent_id}" name="sub_cate_id" id="sub_cate_id" onclick="searchGoods();" value="{$sub.sapval}">{$sub.cat_name}</li>        {/foreach}    </ul></form>