Тест

array(3) {
  [29]=>
  array(7) {
    [0]=>
    array(8) {
      ["ID"]=>
      string(2) "29"
      ["KEY"]=>
      int(0)
      ["NAME"]=>
      string(6) "Кровля"
      ["CODE"]=>
      string(7) "krovlya"
      ["SECTIONS"]=>
      array(0) {
      }
      ["ELEMENTS"]=>
      array(0) {
      }
      ["LEVEL"]=>
      string(1) "1"
      ["PARENT"]=>
      NULL
    }
    [1]=>
    array(8) {
      ["ID"]=>
      string(2) "32"
      ["KEY"]=>
      int(1)
      ["NAME"]=>
      string(19) "Кровельные покрытия"
      ["CODE"]=>
      string(19) "krovelnye-pokrytiya"
      ["SECTIONS"]=>
      array(0) {
      }
      ["ELEMENTS"]=>
      array(0) {
      }
      ["LEVEL"]=>
      string(1) "2"
      ["PARENT"]=>
      string(2) "29"
    }
    [2]=>
    array(8) {
      ["ID"]=>
      string(2) "33"
      ["KEY"]=>
      int(2)
      ["NAME"]=>
      string(19) "Водосточные системы"
      ["CODE"]=>
      string(20) "vodostochnye-sistemy"
      ["SECTIONS"]=>
      array(0) {
      }
      ["ELEMENTS"]=>
      array(0) {
      }
      ["LEVEL"]=>
      string(1) "2"
      ["PARENT"]=>
      string(2) "29"
    }
    [3]=>
    array(8) {
      ["ID"]=>
      string(2) "34"
      ["KEY"]=>
      int(3)
      ["NAME"]=>
      string(24) "Кровельные комплектующие"
      ["CODE"]=>
      string(27) "krovelnye-komplektuyushchie"
      ["SECTIONS"]=>
      array(0) {
      }
      ["ELEMENTS"]=>
      array(0) {
      }
      ["LEVEL"]=>
      string(1) "2"
      ["PARENT"]=>
      string(2) "29"
    }
    [4]=>
    array(8) {
      ["ID"]=>
      string(2) "35"
      ["KEY"]=>
      int(4)
      ["NAME"]=>
      string(36) "Мансардные окна и чердачные лестницы"
      ["CODE"]=>
      string(39) "mansardnye-okna-i-cherdachnye-lestnitsy"
      ["SECTIONS"]=>
      array(0) {
      }
      ["ELEMENTS"]=>
      array(0) {
      }
      ["LEVEL"]=>
      string(1) "2"
      ["PARENT"]=>
      string(2) "29"
    }
    [5]=>
    array(8) {
      ["ID"]=>
      string(2) "36"
      ["KEY"]=>
      int(5)
      ["NAME"]=>
      string(7) "Флюгера"
      ["CODE"]=>
      string(8) "flyugera"
      ["SECTIONS"]=>
      array(0) {
      }
      ["ELEMENTS"]=>
      array(0) {
      }
      ["LEVEL"]=>
      string(1) "2"
      ["PARENT"]=>
      string(2) "29"
    }
    [6]=>
    array(8) {
      ["ID"]=>
      string(3) "359"
      ["KEY"]=>
      int(6)
      ["NAME"]=>
      string(20) "Подкровельные пленки"
      ["CODE"]=>
      string(19) "podkrovelnye-plenki"
      ["SECTIONS"]=>
      array(0) {
      }
      ["ELEMENTS"]=>
      array(0) {
      }
      ["LEVEL"]=>
      string(1) "2"
      ["PARENT"]=>
      string(2) "29"
    }
  }
  [30]=>
  array(1) {
    [0]=>
    array(8) {
      ["ID"]=>
      string(2) "30"
      ["KEY"]=>
      int(7)
      ["NAME"]=>
      string(5) "Фасад"
      ["CODE"]=>
      string(5) "fasad"
      ["SECTIONS"]=>
      array(0) {
      }
      ["ELEMENTS"]=>
      array(0) {
      }
      ["LEVEL"]=>
      string(1) "1"
      ["PARENT"]=>
      NULL
    }
  }
  [31]=>
  array(1) {
    [0]=>
    array(8) {
      ["ID"]=>
      string(2) "31"
      ["KEY"]=>
      int(8)
      ["NAME"]=>
      string(8) "Ландшафт"
      ["CODE"]=>
      string(9) "landshaft"
      ["SECTIONS"]=>
      array(0) {
      }
      ["ELEMENTS"]=>
      array(0) {
      }
      ["LEVEL"]=>
      string(1) "1"
      ["PARENT"]=>
      NULL
    }
  }
}

Кровля

Фасад

Ландшафт