docs/_includes/topnav.html
{% if site.top_navigation %}
<div id="nav">
<ul class="min_width">
{% for item in site.top_navigation %}
{% unless item.url contains '://' %}
{% assign url = item.url | relative_url %}
{% else %}
{% assign url = item.url %}
{% endunless %}
<li{% if item.url == page.url or item.active == true %} class="active"{% endif %}><a href="{{ url }}">{{ item.title }}</a></li>
{% endfor %}
</ul>
</div>
{% endif %}