<%= buttongroup
        buttons => [
            ['Button 1'],
            ['Button 2'],
            ['Button 3'],
        ]
    %>

    <div class="btn-group">
        <button class="btn btn-default" type="button">Button 1</button>
        <button class="btn btn-default" type="button">Button 2</button>
        <button class="btn btn-default" type="button">Button 3</button>
    </div>