reactcrm/app/widgets/ActionButtons.php

<?php

namespace yyi\widgets;

use yii\base\Widget;
use yii\bootstrap4\Html;

class ActionButtons extends Widget
{
    public $buttons;

    public function run()
    {
        if (empty($this->buttons)) {
            return;
        }

        $buttons = [];
        foreach ($this->buttons as $button){
            $buttons[] = Html::a($button->title);
        }
        echo implode('', $buttons);
    }
}