How to make another array from one array, but with grouping by element value?

Question

PHP

Like from an array like this:

array (
  'NQ' => 'Комод',
  0 => 
  array (
    'Tr' => 'Вишня',
    'Ht' => 'значение',
    'HS' => 'значение',
    'AT' => 'значение',
  ),
  1 => 
  array (
    'Tr' => 'Вишня',
    'Ht' => 'значение2',
    'HS' => 'значение2',
    'AT' => 'значение2',
  ),
  2 => 
  array (
    'Tr' => 'Вишня',
    'Ht' => 'значение3',
    'HS' => 'значение3',
    'AT' => 'значение3',
    ),
  3 => 
  array (
    'Tr' => 'Бук',
    'Ht' => 'значение4',
    'HS' => 'значение4',
    'AT' => 'значение4',
  ),
  4 => 
  array (
    'Tr' => 'Бук',
    'Ht' => 'значение5',
    'HS' => 'значение5',
    'AT' => 'значение5',
  ),

do

array (
  'NQ' => 'Комод',
  'CL' => 'Вишня',
    0 => 
      array (
        'Ht' => 'значение',
        'HS' => 'значение',
        'AT' => 'значение',
  ),
    1 => 
      array (
      'Ht' => 'значение2',
      'HS' => 'значение2',
      'AT' => 'значение2',
  ),
    2 => 
      array (
        'Ht' => 'значение3',
        'HS' => 'значение3',
        'AT' => 'значение3',
    ),
  'CL' => 'Бук',
    0 => 
      array (
      'Ht' => 'значение4',
      'HS' => 'значение4',
      'AT' => 'значение4',
  ),
    1 => 
      array (
      'Ht' => 'значение5',
      'HS' => 'значение5',
      'AT' => 'значение5',
  ),

Answer 1

You brought an invalid structure as the desired result, so no way.

Answer 2

Ummm, there really is no way
Make a new array, where the first element will be Chest and the second is the first value of the nested array, the color and the nested elements will be old (that is, delete the first occurrence)
In the loop, iterate and collect a new array