比如我一个html里有如下片段
        <div id="footerHacked">
                            <ul id="footer-info">
                                            <li id="footer-info-lastmod"> 本页面最后修订于2013年5月31日 (星期五) 11:54。</li>
                                            <li id="footer-info-viewcount">此页面已被浏览过40次。</li>
                                    </ul>
                            <ul id="footer-places">
                                            <li id="footer-places-privacy"><a href="kingtrader2.html" title="Kingtrader帮助系统:隐私权政策">隐私权政策</a></li>
                                            <li id="footer-places-about"><a href="kingtrader3.html" title="Kingtrader帮助系统:关于">关于kingtrader帮助系统</a></li>
                                            <li id="footer-places-disclaimer"><a href="kingtrader4.html" title="Kingtrader帮助系统:免责声明">免责声明</a></li>
                                    </ul>
                                        <ul id="footer-icons" class="noprint">
                    <li id="footer-poweredbyico">
                        <a href="http://www.mediawiki.org/"><img src="poweredby_mediawiki_88x31.png" alt="Powered by MediaWiki" width="88" height="31" /></a>
                    </li>
                </ul>
                        <div style="clear:both"></div>
        </div>


这里是固定的
<div id="footerHacked">
...
</div>

注意  ...处可能有内嵌的 标签div
<div id="aaa">
**********
</div>


我想找到这些片段，替换成空白。
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