$VAR1 = [
  {
    'subject_loop' => [
        {
          'subject_id' => '2',
          'subject_name' => 'africa'
        },
        {
          'subject_id' => '101',
          'subject_name' => 'congo'
        },
    'category_name' => 'africa'
  },
  {
    'subject_loop' => [
        {
          'subject_id' => '10',
          'subject_name' => 'argentina'
        },
        {
          'subject_id' => '11',
          'subject_name' => 'bolivia'
        },
        {
          'subject_id' => '12',
          'subject_name' => 'brazil'
        },
    'category_name' => 'americas'
  },