           <button class="toggle is-active" data-toggle-target="#demo-panel-tabs-1" data-toggle-group=".demo-panel-tabs" aria-expanded="true">Tab toggle 1</button>

              <button class="toggle" data-toggle-target="#demo-panel-tabs-2" data-toggle-group=".demo-panel-tabs" aria-expanded="false">Tab toggle 2</button>

              <button class="toggle" data-toggle-target="#demo-panel-tabs-3" data-toggle-group=".demo-panel-tabs" aria-expanded="false">Tab toggle 3</button>
            </div>

          