#set( $id = $context.getRequestParameter("categoryid") )

#if( !$id && $category )
	#set( $id = $category.id )
#end

#if( $id)
	$!categoryPickerTree.getTreeRenderer().setSelectedNodeById($id)
#end
<script language="javascript">
	var lastselected = "$categoryPickerTree.getTreeRenderer().getSelectedId()";
	categoryPickerTree.selectRow(lastselected); 
</script> 
<div id="$categoryPickerTree.getName()render">      
	$!categoryPickerTree.render()
</div>