zurb-foundation-5/doc/includes/button_group/examples_button_group_basic.html

Foundation 5 for npm (no code modification from original repo)

<ul class="button-group">
  <li><a href="#" class="button">Button 1</a></li>
  <li><a href="#" class="button">Button 2</a></li>
  <li><a href="#" class="button">Button 3</a></li>
</ul>