silverstripe-cms/templates/Includes/StatisticsAdmin_left.ss

<div class="title"><div>Report Types</div></div>

<div id="treepanes">
	<div id="sitetree_holder" style="overflow:auto">
		<ul id="statsleft_tree" class="tree unformatted">
			<ul><li><a href="$rootLink">Overview</a></li></ul>
			<ul><li><a href="$rootLink">Users</a></li></ul>
			$SiteTreeAsUL
		</ul>
	</div>
</div>