backend/views/menu/_form.php

<?php
use yii\helpers\Html;
use yii\widgets\ActiveForm;
use yii\helpers\ArrayHelper;
use kartik\select2\Select2;
/* @var $this yii\web\View */
/* @var $model common\models\Menu */
/* @var $form yii\widgets\ActiveForm */
?>
<div class="menu-form">
    <?php $form = ActiveForm::begin(); ?>
    
    <?= $form->field($model, 'termin_id')->widget(Select2::classname(), [
            //'data' => $data,
            'language' => 'ru',
            'options' => ['placeholder' => 'под меню ...'],
            'pluginOptions' => [
                
            ],
        'data' => ArrayHelper::map($termin, 'termin_id', 'termin_title'), // data as array
    ]) ?>
    <?= $form->field($model, 'menu_pid')->widget(Select2::classname(), [
            //'data' => $data,
            'language' => 'ru',
            'options' => ['placeholder' => 'Меню родитель ...'],
            'pluginOptions' => [
                
            ],
        'data' => ArrayHelper::map($menu, 'termin_id', 'termin_title'), // data as array
    ]) ?>
    
    <?= $form->field($model, 'show')->dropDownList(['1' => Yii::t('action', 'show'), '0' => Yii::t('action', 'hide')]) ?>
    <?= $form->field($model, 'sortorder')->dropDownList(['1' => '1', '0' => '2']) ?>
    <div class="form-group">
        <?= Html::submitButton($model->isNewRecord ? Yii::t('app', 'Create') : Yii::t('app', 'Update'), ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
    </div>
    <?php ActiveForm::end(); ?>
</div>