Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.4)
// Compass (v1.0.1)
// ----

$array:(
  allitems: (
    subitems: (
      item1: 'test1',
      item2: 'test2',
      item3: 'test3'
    ),
    subitems2: (
      item45: 'testsubitem'
    )
  )
);

//$columns:  map-get(map-get($grid_options, options), columns);
$subitems: map-get( map-get($array, allitems), subitems);
 
@each $subitem in $subitems{
  $value: nth($subitem,2);
  .test{
    val: $value;
  }
}

SassMeister-output.css

.test {
  val: "test1";
}

.test {
  val: "test2";
}

.test {
  val: "test3";
}