index.html

<div class="container m-down-20">
  <div class="row">
    <div class="col-sm-12 text-center">
      <div
        id="abc-btn-toolbar"
        role="toolbar"
        aria-label="Společnosti podle abecedy"
      >
        <div id="abc-btn-group" role="group" aria-label="Seskupení">
          <a href="#" type="button" role="button" class="btn btn-default"
            >0-9</a
          >
          <a href="#" type="button" role="button" class="btn btn-default">A</a>
          <a href="#" type="button" role="button" class="btn btn-default">B</a>
          <a href="#" type="button" role="button" class="btn btn-default">C</a>
          <a href="#" type="button" role="button" class="btn btn-default">Č</a>
          <a href="#" type="button" role="button" class="btn btn-default">D</a>
          <a href="#" type="button" role="button" class="btn btn-default">E</a>
          <a href="#" type="button" role="button" class="btn btn-default">F</a>
          <a href="#" type="button" role="button" class="btn btn-default">G</a>
          <a href="#" type="button" role="button" class="btn btn-default">H</a>
          <a href="#" type="button" role="button" class="btn btn-default">I</a>
          <a href="#" type="button" role="button" class="btn btn-default">J</a>
          <a href="#" type="button" role="button" class="btn btn-default">K</a>
          <a href="#" type="button" role="button" class="btn btn-default">L</a>
          <a href="#" type="button" role="button" class="btn btn-default">M</a>
          <a href="#" type="button" role="button" class="btn btn-default">N</a>
          <a href="#" type="button" role="button" class="btn btn-default">O</a>
          <a href="#" type="button" role="button" class="btn btn-default">P</a>
          <a href="#" type="button" role="button" class="btn btn-default">Q</a>
          <a href="#" type="button" role="button" class="btn btn-default">R</a>
          <a href="#" type="button" role="button" class="btn btn-default">Ř</a>
          <a href="#" type="button" role="button" class="btn btn-default">S</a>
          <a href="#" type="button" role="button" class="btn btn-default">Š</a>
          <a href="#" type="button" role="button" class="btn btn-default">T</a>
          <a href="#" type="button" role="button" class="btn btn-default">U</a>
          <a href="#" type="button" role="button" class="btn btn-default">V</a>
          <a href="#" type="button" role="button" class="btn btn-default">W</a>
          <a href="#" type="button" role="button" class="btn btn-default">X</a>
          <a href="#" type="button" role="button" class="btn btn-default">Y</a>
          <a href="#" type="button" role="button" class="btn btn-default">Z</a>
          <a href="#" type="button" role="button" class="btn btn-default">Ž</a>
          <a href="#" type="button" role="button" class="btn btn-default">#</a>
        </div>
      </div>
    </div>
  </div>
</div>