一个正则表达式的求教解决办法

一个正则表达式的求教

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<h1 class="firstHeading">PDF阅读器</h1>
        <div id="bodyContent">
            <h3 id="siteSub">取自 AEED</h3>
            <div id="contentSub"></div>
                                    <div id="jump-to-nav">跳转到: <a href="#column-one">导航</a>, <a href="#searchInput">搜索</a>
</div>            <!-- start content -->
            <div id="divPdf0" title="../2003Z/AdbeRdr812_zh_CN.zip" class="downpdf" style="cursor:hand;">PDF阅读器 Adobe Reader 8.1.2 简体中文版</div>
//---------------------

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取自"<a href="http://localhost/index.php/PDF%E9%98%85%E8%AF%BB%E5%99%A8">http://localhost/index.php/PDF%E9%98%85%E8%AF%BB%E5%99%A8</a>"</div>
                        <!-- end content -->
            <div class="visualClear"></div>
        </div>
    
        
        <div id="column-one">
    <div id="p-cactions" class="portlet">
        <h5>查看</h5>
        <div class="pBody">
            <ul>
                         <li id="ca-nstab-main" class="selected"><a href="/index.php/PDF%E9%98%85%E8%AF%BB%E5%99%A8">条目</a></li>
                         <li id="ca-talk" class="new"><a href="/index.php?title=Talk:PDF%E9%98%85%E8%AF%BB%E5%99%A8&action=edit">讨论</a></li>
                         <li id="ca-edit"><a href="/index.php?title=PDF%E9%98%85%E8%AF%BB%E5%99%A8&action=edit">编辑</a></li>
                         <li id="ca-history"><a href="/index.php?title=PDF%E9%98%85%E8%AF%BB%E5%99%A8&action=history">历史</a></li>
                </ul>
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    </div>
    <div class="portlet" id="p-personal">
        <h5>个人工具</h5>
        <div class="pBody">
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                <li id="pt-login"><a href="/index.php?title=Special:Userlogin&returnto=PDF%E9%98%85%E8%AF%BB%E5%99%A8">登录/注册</a></li>
            </ul>
        </div>
    </div>
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        <div class="portlet" id="p-.E7.9F.A5.E8.AF.86.E5.BA.93">
        <div class="pBody">
        </div>
    </div>
        <div id="p-search" class="portlet">
        <h5><label for="searchInput">搜索</label></h5>
        <div id="searchBody" class="pBody">
            <form action="/index.php/Special:Search" id="searchform"><div>
                <input id="searchInput" name="search" type="text" accesskey="f" value="">
                <input type="submit" name="go" class="searchButton" id="searchGoButton" value="进入"> 
                <input type="submit" name="fulltext" class="searchButton" id="mw-searchButton" value="搜索">
            </div></form>
        </div>
    </div>
    <div class="portlet" id="p-tb">
        <h5>工具箱</h5>
        <div class="pBody">
        </div>
    </div>
        </div><!-- end of the left (by default at least) column -->
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                <div id="f-copyrightico"><a href="http://www.gnu.org/copyleft/fdl.html"><img src="/skins/common/images/gnu-fdl.png" alt="GNU Free Documentation License 1.2"></a></div>
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