JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<div class="btn-group">
    <a href="Default.aspx" class="btn btn-primary">Home</a>
    <div class="btn-group">
        <a href="QuemSomos.aspx" class="btn btn-primary dropdown-toggle"  data-toggle="dropdown">Quem Somos</a>
        <button class="btn btn-primary dropdown-toggle"  data-toggle="dropdown">
            <span class="caret"></span>   
        </button>
        <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu">
            <li><a href="#">Certificações</a></li>
            <li><a href="#">Alianças Estratégicas</a></li>
        </ul>
    </div>
</div>