SiteMapPath控件生成代码疑问

SiteMapPath控件生成代码疑问
它的四个模板都无法决定下面所生成的多余<span>．．．．那么多<span>好乱啊好郁闷．有没有办法解决啊
<span id="SiteMapPath1"><a href="#SiteMapPath1_SkipLink"><img alt="跳过导航链接" height="0" width="0" src="/Code%207-2/WebResource.axd?d=2_ipOu9HaE_68EMGcHBhIQ2&amp;t=633363589941118727" style="border-width:0px;" /></a><span>
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                    </span><span><a href="/Code%207-2/sitemapsB.aspx">人文类书籍</a></span><span>
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                    </span><span><a href="/Code%207-2/sitemapsB4.aspx">历史</a></span><span>
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                    </span><span>近代史</span><a id="SiteMapPath1_SkipLink"></a></span>