<?php if (empty($mainCategories)) {
    exit("Нет категорий объявлений в базе данных.");
} ?>
<?php foreach (array_chunk($mainCategories, 4, true) as $categories) { ?>
    <div class="header__wrapper-categories">
        <?php foreach ($categories as $id => $category) { ?>
            <div class="header__main-categories" data-main-categories="<?= $id ?>">
                <img src="/img/announcement_icon/<?= $category->image ?>" alt="image"
                     data-main-categories="<?= $id ?>"/>
                <span data-main-categories="<?= $id ?>"><?= $category->title ?></span>
            </div>
            <?php foreach (RedBeanPHP\R::find("sub_categories", "category_id=?", [$id]) as $subCategory) { ?>
                <a href="?<?= $subCategory->title ?>">
                    <img src="/img/announcement_icon/sub_categories/arrow-right.png" alt="arrow"/>
                    <?= $subCategory->title ?>
                </a>
            <?php } ?>
        <?php } ?>
    </div>
<?php } ?>