while ($row = mysqli_fetch_assoc($rowc)) {
            echo "<div class=\"icon-block\">";
            echo "<a href=\"categories.php?category_id={$row['name']}\" class =\"cyan-text\" style=\"font-weight: bold; text-transform: uppercase;\">  " . $row['name'] . "</a>";
            while ($r = mysqli_fetch_assoc($subcategories_list)) {
               if($row['id'] === $r['category_id']) {
                    echo "<div class=\"icon-block\">";
                    echo "<a href=\"categories.php?category_id={$row['name']}&subcategory_id={$r['name']}\" class =\"cyan-text\" text-transform: uppercase;\">  " . $r['name'] . "</a>";
                    echo "</div><br><br>";
               }
            }
            echo "</div><br>";

        }