array(3) { [0]=> array(2) { ["category_id"]=> string(1) "1" ["parent_id"]=> NULL } [1]=> array(2) { ["category_id"]=> string(2) "29" ["parent_id"]=> NULL } [2]=> array(2) { ["category_id"]=> string(2) "44" ["parent_id"]=> string(1) "8" } }