site/_includes/themes/apache/doc.html

<!--<div class="hero-unit {{ page.title | lowercase }}">
  <h1>{% if page.tagline %} <small>{{ page.tagline }}</small>{% endif %}</h1>
</div>
-->

<div class="row">
    <div class="col-md-3" role="complementary">
        {% include themes/apache/_navigation_doc.html %}
    </div>
    <div class="col-md-9" role="main">
        {{ content }}
    </div>
</div>