<form class="form-horizontal" method="post"> <div class="form-group"> <label for="number" class="control-label col-xs-4">年月</label> <div class="col-xs-3"> <select class="form-control" id="number" name="yyyymm"> <option value="">選択してください</option> <option value="201805">201805</option> </select></div></div></form>