วานผู้รู้ bootstrap ช่วยที class="tabbable" nav bar

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