Passing ids and values in Select2

                <?php
                    $membershipFee = ArrayHelper::map(Fee::find()->joinWith('feeLists')->where(['fee_list_id'=>$membership->fee_list_id])->orderBy('name')->all(), 'id', 'name');
                 //   echo $form->field($memberEnroll, 'id[]',['inputOptions' => ['class' => 'form-control','id'=>'fee-id','tabindex'=>4]])->dropDownList($membershipFee)->label('Membership Fee');
                                echo Select2::widget([
                'model' => $memberEnroll,
                'attribute' => 'id[]',
                'data'=> ArrayHelper::map($fees, 'id', 'name'),
                'options' => [
                    'placeholder' => 'Select Complex ...', 'multiple' => false,                     
                    'class' => 'col-md-3',
                    'id'=> 'fee-id' //this is the key
                    ],
                    'pluginOptions' => [
                    'allowClear' => true,
                ],


            ]);
                ?>
                
                
                        var fee_id = $('#fee-id').val(); //the jquery