Hide Subcategories from Top Menu

[adept+]

Please help. How limiting subcategories in the Prestashop Top Menu?
I cant to disable subcategories levels (over 3) on top menu.

I use default top menu module in my prestashop 1.6.1.3 (default-bootstrap)
It display a lot of subcategories in the tree (after hovering on menu item)

I change on modules/blocktopmenu/blocktopmenu.php

if (isset($category[‘children’]) && !empty($category[‘children’]))
with this
if ($category[‘level_depth’] < 4 && isset($category[‘children’]) && !empty($category[‘children’]))

But this solutions not working