Виктор

<?= ListView::widget([
    'dataProvider' => $dataProvider,
    'itemOptions' => ['class' => 'item'],
    'itemView' => '_list_item',
    'viewParams' => [
       'achieves' => AchieveUser::find()
            ->where([
                'id_user' => Yii::$app->user->identity->id,
            ])
            ->select('id_achieve')
            ->index('id_achieve')
            ->all()
    ],
]) ?>

<?php
        if(isset($achieves[$model->id])){
echo 'Добавлено';
}
        echo $model->title;
    ?><code >

$i=0;
CHtml::listData($stars, 'id', function($model) use (&$i){
return $i++;
})

$file=UploadedFile::getInstance($model, 'imageFile');
if($file &&$file instanceof UploadedFile){
            $model->imageFile = $file;
            if ($model->upload()) {
                // file is uploaded successfully
                return;
            }
}