discuz 自定义页面多选项

<?php
define('CURSCRIPT', 'about');
define('CURMODULE', 'index');
require './source/class/class_core.php';
$discuz = & discuz_core::instance();
$discuz->cachelist = $cachelist;
$discuz->init();
loadcache('diytemplatename');
    if($_GET['v']==1 || empty($_G[gp_v]) ){
        $navtitle = 标题1;
    }elseif($_GET['v']==2){
        $navtitle = 标题2;
    }
    elseif($_GET['v']==3){
        $navtitle = 标题3;
    }
    elseif($_GET['v']==4){
        $navtitle = 标题4;
    }
$metakeywords = '这里定义单页的关键词';
$metadescription ='这里定义单页的描述内容';
include template('diy:about/about');
?>

{subtemplate common/header}
<div id="pt" class="cl">
    <div class="z">
        <a href="index.php" class="nvhm">$_G[setting][bbname]</a><em>»</em>自定义页面
    </div>
</div>
<style id="diy_style" type="text/css"></style>
<div id="ct" class="wp cl n">
    <div class="mn">
        <div class="bm" style="padding:0 15px;">
            <ul class="tb cl">
                <li <!--{if empty($_G[gp_v]) || $_G[gp_v] == '1'}-->class="a"<!--{/if}-->><a href="about.php?v=1">内容1</a></li>
                <li <!--{if $_G[gp_v] == '2'}-->class="a"<!--{/if}-->><a href="about.php?v=2">内容2</a></li>
                <li <!--{if $_G[gp_v] == '3'}-->class="a"<!--{/if}-->><a href="about.php?v=3">内容3</a></li>
                <li <!--{if $_G[gp_v] == '4'}-->class="a"<!--{/if}-->><a href="about.php?v=4">内容4</a></li>
            </ul>
            <div class="datalist" style="margin:10px 0;">
                <!--{if empty($_G[gp_v]) || $_G[gp_v] == '1'}-->
                1
                <!--{elseif $_G[gp_v] == '2'}-->
                2
                <!--{elseif $_G[gp_v] == '3'}-->
                3
                <!--{elseif $_G[gp_v] == '4'}-->
                4
                <!--{/if}-->
            </div>
        </div>
    </div>          
</div>
{subtemplate common/footer}