演示站点：www.54zhanzhang.com
在template/default/common/header.htm
找到
<!--{if !empty($_G['cookie']['widthauto']) && empty($_G['disabledwidthauto'])}-->
<link rel="stylesheet" id="css_widthauto" type="text/css" href="data/cache/style_{STYLEID}_widthauto.css?{VERHASH}" />
<script type="text/javascript">HTMLNODE.className += ' widthauto'</script>
<!--{/if}-->
改为下面的代码，其实就是去掉了判断
<link rel="stylesheet" id="css_widthauto" type="text/css" href="data/cache/style_{STYLEID}_widthauto.css?{VERHASH}" />
<script type="text/javascript">HTMLNODE.className += ' widthauto'</script>
接下来找到
<ul class="wslct">
<li><a href="javascript:;"><!--{if empty($_G['cookie']['widthauto'])}-->{lang switch_wide}<!--{else}-->{lang switch_narrow}<!--{/if}--></a></li>
</ul>
替换为下面的代码
<ul class="wslct">
<li><a href="javascript:;"><!--{if empty($_G['cookie']['widthauto'])}-->{lang switch_narrow}<!--{else}-->{lang switch_wide}<!--{/if}--></a></li>
</ul>
后台更新缓存OK，注意：此修改只适合论坛，不适用门户
