<div class="card card-custom">
 <div class="card-header">
  <h3 class="card-title">
   Bootstrap Multiple Select Splitter Examples
  </h3>
 </div>
 <!--begin::Form-->
 <form class="form">
  <div class="card-body">
   <div class="form-group row">
    <label class="col-form-label text-right col-lg-3 col-sm-12">Standard Group Select</label>
    <div class="col-lg-4 col-md-9 col-sm-12">
     <select class="form-control">
      <optgroup label="Category 1">
       <option value="1">Choice 1</option>
       <option value="2">Choice 2</option>
       <option value="3">Choice 3</option>
       <option value="4">Choice 4</option>
      </optgroup>
      <optgroup label="Category 2">
       <option value="5">Choice 5</option>
       <option value="6">Choice 6</option>
       <option value="7">Choice 7</option>
       <option value="8">Choice 8</option>
      </optgroup>
      <optgroup label="Category 3">
       <option value="5">Choice 9</option>
       <option value="6">Choice 10</option>
       <option value="7">Choice 11</option>
       <option value="8">Choice 12</option>
      </optgroup>
     </select>
    </div>
   </div>
   <div class="form-group row">
    <label class="col-form-label text-right col-lg-3 col-sm-12">Select Splitter 1</label>
    <div class="col-lg-4 col-md-9 col-sm-12">
     <select class="form-control" id="kt_multipleselectsplitter_1">
      <optgroup label="Category 1">
       <option value="1" >Choice 1</option>
       <option value="2">Choice 2</option>
       <option value="3">Choice 3</option>
       <option value="4">Choice 4</option>
      </optgroup>
      <optgroup label="Category 2">
       <option value="5">Choice 5</option>
       <option value="6" selected>Choice 6</option>
       <option value="7">Choice 7</option>
       <option value="8">Choice 8</option>
      </optgroup>
      <optgroup label="Category 3">
       <option value="5">Choice 9</option>
       <option value="6">Choice 10</option>
       <option value="7">Choice 11</option>
       <option value="8">Choice 12</option>
      </optgroup>
     </select>
    </div>
   </div>
   <div class="row">
    <label class="col-form-label text-right col-lg-3 col-sm-12">Select Splitter 2</label>
    <div class="col-lg-4 col-md-9 col-sm-12">
     <select class="form-control" id="kt_multipleselectsplitter_2">
      <optgroup label="Group 1">
       <option value="1" selected>Option 1</option>
       <option value="2">Option 2</option>
       <option value="3">Option 3</option>
       <option value="4">Option 4</option>
      </optgroup>
      <optgroup label="Group 2">
       <option value="5">Option 5</option>
       <option value="6">Option 6</option>
       <option value="7">Option 7</option>
       <option value="8">Option 8</option>
      </optgroup>
      <optgroup label="Group 3">
       <option value="5">Option 9</option>
       <option value="6">Option 10</option>
       <option value="7">Option 11</option>
       <option value="8">Option 12</option>
      </optgroup>
      <optgroup label="Group 4">
       <option value="5">Option 13</option>
       <option value="6">Option 14</option>
       <option value="7">Option 15</option>
       <option value="8">Option 16</option>
      </optgroup>
      <optgroup label="Group 5">
       <option value="5">Option 17</option>
       <option value="6">Option 18</option>
       <option value="7">Option 19</option>
       <option value="8">Option 20</option>
      </optgroup>
     </select>
    </div>
   </div>
  </div>
  <div class="card-footer">
   <div class="row">
    <div class="col-lg-9 ml-lg-auto">
     <button type="reset" class="btn btn-primary mr-2">Submit</button>
     <button type="reset" class="btn btn-secondary">Cancel</button>
    </div>
   </div>
  </div>
 </form>
 <!--end::Form-->
</div>