index.html

<div class="tabbable">
  <ul class="nav nav-tabs">
    <li class="active"><a href="#" data-tab-name="tab1" data-toggle="tab">Section 1</a></li>
    <li><a href="#" data-tab-name="tab2" data-toggle="tab">Section 2</a></li>
  </ul>
  <div class="tab-content">
    <div class="tab-pane active" data-tab-name="tab1">
      <p>I'm in Section 1.</p>
    </div>
    <div class="tab-pane" data-tab-name="tab2">
      <p>Howdy, I'm in Section 2.</p>
    </div>
  </div>
</div>