Nested array

[molloeduardo]

This is a huge challenge that I've tried to solve for many many hours. Maybe one of you can get over this. If you find a solution, please contact me.

The problem is with this part of code:

The result should be:
Test 1
Test 1.1
Test 1.2
Test 2
Test 2.1
Test 2.2

Insted I have this result:
Test 1
Test 2
Test 2.1
Test 2.2