amber-documentation/_includes/nav.html

<ul class="nav amber-nav">
	{% assign sorted_pages = site.pages | sort:"name" %}
	{% for node in sorted_pages %}
		{% unless node.parent or node.hide %}

			{% if page.url == node.url %}
				<li class="active"><a href="{{node.url}}" class="active">{{node.title}}</a></li>
			{% else %}
				<li><a href="{{node.url}}">{{node.title}}</a></li>
			{% endif %}

			<ul class="nav">
			{% for subnode in sorted_pages %}
					{% if subnode.parent == node.title %}

						{% if page.url == subnode.url %}
							<li class="active"><a href="{{subnode.url}}" class="active">{{subnode.title}}</a></li>
						{% else %}
							<li><a href="{{subnode.url}}">{{subnode.title}}</a></li>
						{% endif %}
			

					{% endif %}
				{% endfor %}
			</ul>


		{% endunless %}
	{% endfor %}
</ul>