<ul class="nav nav-tabs md-tabs tabs-cyan nav-justified">

        <li class="nav-item">

            <a class="nav-link active" data-toggle="tab" href="#panel_Profile" role="tab">Profile</a>

        </li>

</ul>

<form class="needs-validation md-form">

​

<div class="tab-content card">

<div class="tab-pane fade in show active" id="panel_Profile" role="tabpanel">

  <div class="md-form">

   <label for="address4">Address 4</label>

   <input id="address4" name="address4" type="text" class="form-control" value="">

  </div>

  <div class="row">

    <div class="col">

    <select id="country" name="country" class="mdb-select md-form" searchable="Search here..">

      <option value="" disabled selected>Please select</option>

    <option value="AU">Australia</option>

      <option value="UK">United Kingdom</option>

    </select>

   <label for="country" class="ml-3">Country</label>

   </div>

  </div>

  <div class="md-form">

   <label for="phone">Phone</label>

    <input id="phone" name="phone" type="text" class="form-control" value="">

  </div>

 </div>

 </div>

  </form>