The most relevant thread I've found in here is this: Remove category & tag base from WordPress url - without a plugin
I've tried everything in there - from changing the functions.php file to installing the wp-no-category-base plugin. After working with this for hours I believe I understand what's the issue (although I don't have the solution).
I added the following code: https://gist.github.com/morsdyce/9e88db1eba916163cc23
What this code does is pretty straight forward - for every page that I attribute another page to it, it will be considered as a category, plus - it won't be a drop down be have it's own unique lines.
For instance - see the following screen shot: enter image description here
Still, I would like to remove the category from the URL. Bear in mind this is not the category per se but the page (parent).
Any idea how to solve this?
Thanks in advance.