gistfile1.txt

<f:render section="categoryList" arguments="{categories: categories, isFirstLevel: 1}" />

<f:section name="categoryList">
	<ul>
		<f:for each="{categories}" as="category">
			<li>
				{category.title}
				<f:if condition="{category.children}">
					<f:render section="categoryList" arguments="{categories: category.children,  isFirstLevel: 0}" />
				</f:if>
			</li>
		</f:for>
	</ul>
</f:section>