isotope html button with active is chaked

isotope html button group

      <div class="button-group filter-button-group">
        <button>Featured Projects-</button>
        <button class="button is-checked" data-filter="*">show all</button>
        <button class="button" data-filter=".cat-1">Web site</button>
        <button class="button" data-filter=".cat-2">Print</button>
        <button class="button" data-filter=".cat-3">Mobile</button>
        <button class="button" data-filter=".cat-4">Photography</button>
        <button class="button" data-filter=".cat-5">Illustration</button>
        <button class="button" data-filter=".cat-6">Logo Design</button>
      </div>