HTML
<div class="row">
<div class="col-sm-5">
<select name="from" id="optgroup" class="form-control" size="8" multiple="multiple">
<optgroup label="Swedish Cars">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
</optgroup>
<optgroup label="German Cars">
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</optgroup>
<option value="1">C++</option>
</select>
</div>
<div class="col-sm-2">
<button type="button" id="optgroup_rightAll" class="btn btn-block"><i class="glyphicon glyphicon-forward"></i></button>
<button type="button" id="optgroup_rightSelected" class="btn btn-block"><i class="glyphicon glyphicon-chevron-right"></i></button>
<button type="button" id="optgroup_leftSelected" class="btn btn-block"><i class="glyphicon glyphicon-chevron-left"></i></button>
<button type="button" id="optgroup_leftAll" class="btn btn-block"><i class="glyphicon glyphicon-backward"></i></button>
</div>
<div class="col-sm-5">
<select name="to" id="optgroup_to" class="form-control" size="8" multiple="multiple">
<option value="1">C++</option>
</select>
</div>
</div>
JavaScript
<script type="text/javascript">
jQuery(document).ready(function($) {
$("#optgroup").multiselect();
});
</script>