<?= $form->field($model, ‘promotion_id’)->dropDownList(ArrayHelper::map(\backend\models\Promotions::find()->all(), ‘id’, ‘name’)) ?>. It is a drop down list in my form. Here the name field shows name of the promotions i have created. but i want to add an additional field because i have duplicate names in my table. For example now i get options as 25% to 50% more than 1 time. so i want it like 25% to 50% - location as choices. please help me.