如何在prestashop的自定义页面中显示类别名称？

I want to get category names as select box in my custom module file discount.php which creates display in backoffice. I am calling the function $cat = CategoryCore::getCategories(); from category.php now when I var_dump($cat); I am getting array but I am not sure how will I get the names only.

Is there any other way to get category names?

Try:

$categories = Category::getCategories($this->context->language->id);

foreach ($categories as $category)
    echo $category['name'];