Хранение и порядок

array(2) {
  [1]=>
  array(1) {
    ["ZERO-INF"]=>
    array(6) {
      ["ID"]=>
      string(6) "725064"
      ["PRICE"]=>
      float(0)
      ["DISCOUNT_PRICE"]=>
      float(0)
      ["UNROUND_DISCOUNT_PRICE"]=>
      float(0)
      ["CURRENCY"]=>
      string(3) "RUB"
      ["VAT_RATE"]=>
      float(0.2)
    }
  }
  [6]=>
  array(1) {
    ["ZERO-INF"]=>
    array(6) {
      ["ID"]=>
      string(6) "725065"
      ["PRICE"]=>
      float(0)
      ["DISCOUNT_PRICE"]=>
      float(0)
      ["UNROUND_DISCOUNT_PRICE"]=>
      float(0)
      ["CURRENCY"]=>
      string(3) "RUB"
      ["VAT_RATE"]=>
      float(0.2)
    }
  }
}

array(2) {
  [1]=>
  array(1) {
    ["ZERO-INF"]=>
    array(8) {
      ["ID"]=>
      string(6) "544082"
      ["PRICE"]=>
      float(4992)
      ["DISCOUNT_PRICE"]=>
      float(4992)
      ["UNROUND_DISCOUNT_PRICE"]=>
      float(4992)
      ["CURRENCY"]=>
      string(3) "RUB"
      ["VAT_RATE"]=>
      float(0.2)
      ["PRINT_PRICE"]=>
      string(17) "4 992 руб"
      ["PRINT_DISCOUNT_PRICE"]=>
      string(17) "4 992 руб"
    }
  }
  [6]=>
  array(1) {
    ["ZERO-INF"]=>
    array(8) {
      ["ID"]=>
      string(6) "544081"
      ["PRICE"]=>
      float(4437)
      ["DISCOUNT_PRICE"]=>
      float(4437)
      ["UNROUND_DISCOUNT_PRICE"]=>
      float(4437)
      ["CURRENCY"]=>
      string(3) "RUB"
      ["VAT_RATE"]=>
      float(0.2)
      ["PRINT_PRICE"]=>
      string(17) "4 437 руб"
      ["PRINT_DISCOUNT_PRICE"]=>
      string(17) "4 437 руб"
    }
  }
}