Changes
<tr>
<td style="vertical-align:top; width:25%">
<categorytree mode=pages hideprefix="always" namespaces="HowTo" showcount="off" style="margin-left:1ex; border:0px solid gray; padding:0.7ex; background-color:white;">PublishingInstalling</categorytree>
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<td style="vertical-align:top; width:25%">
<categorytree mode=pages hideprefix="always" namespaces="HowTo" showcount="off" style="margin-left:1ex; border:0px solid gray; padding:0.7ex; background-color:white;">DocumentPublishing</categorytree>
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<td style="vertical-align:top; width:25%">
<categorytree mode=pages hideprefix="always" namespaces="HowTo" showcount="off" style="margin-left:1ex; border:0px solid gray; padding:0.7ex; background-color:white;">InstallingPOI</categorytree>
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<td style="vertical-align:top; width:25%">
<categorytree mode=pages hideprefix="always" namespaces="HowTo" showcount="off" style="margin-left:1ex; border:0px solid gray; padding:0.7ex; background-color:white;">POIDocument</categorytree>
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