<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <form class="form-horizontal"> <fieldset> <!-- Form Name --> <legend>Notas</legend> <!-- Select Basic --> <div class="form-group"> <label class="col-md-4 control-label" for="semestre">Semestre</label> <div class="col-md-4"> <select id="semestre" name="semestre" class="form-control"> <option value="1">2015.1</option> <option value="2">2015.2</option> </select> </div> </div> </fieldset> </form>