JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
                            <div class="btn-group">
                    <button class="btn dropdown-toggle fullwidth" data-toggle="dropdown">All Services<span class="caret"></span></button>
                    <ul class="dropdown-menu">
                        <li><a href="/">a</a></li>
                        <li><a href="/">b</a></li>
                        <li><a href="/">c</a></li>
                    </ul>
                </div>

CSS

.fullwidth {
    width: 100%;  
    text-align:left;
}