<ul class="nav nav-tabs">
  <li class="nav-item">
    <a class="nav-link <?php if($tabid==1){echo 'active';}?>" href="index">Product</a>
  </li>

  <li class="nav-item">
    <a class="nav-link <?php if($tabid==2){echo 'active';}?>" href="price_list">Daftar Harga</a>
  </li>
  <li class="nav-item">
    <a class="nav-link <?php if($tabid==3){echo 'active';}?>" href="listing">Listing</a>
  </li>

</ul>