<?php $form = ActiveForm::begin(); ?>

    <?= $form->field($model, 'name')->label('Имя') ?>

    <?= $form->field($model, 'category')->label('Категория') ?>

    <?= Html::submitButton('Отправить', ['class' => 'btn btn-primary']) ?>

    <?php ActiveForm::end(); ?>

namespace appmodels;

            use yiidbActiveRecord;

            class Products extends ActiveRecord
            {

                public $name;
                public $category;


                    public static function tableName()
                    {
                        return 'products';
                    }

            }

$model = new Products();
     if ($model->load(Yii::$app->request->post()))
         $model->save();