hello,
I'll try to rephrase my problem.
I prepared my test site for this explanation. it happens here:
besace.info
on horizontal menus AAA and BBB
AAA and BBB menus are configured with a FLEXIcontent category, override to display the items of the parent category and its children.
As you can see, the items are set in two categories (item A in the main category A and category B secondary, conversely for item

By clicking on the horizontal menu AAA, the AAA right menu that appears. If I click on the item A, I stay with the menu right AAA.
By clicking on the horizontal menu AAA, If I click on itemB, I display menu right BBB .
Now, if I go through the right menu, configured in the same way as the horizontal menu:
- i click on "AAA pour l'actu", i see the same items and by clicking the itemB, i stay on menu right AAA !!!
- From menu right BBB, i click on "BBB pour l'actu", i see the same items and by clicking on the item A, i'm staying on menu right BBB, GOOD !!!
It's wonderful, and it's what I want !!!
BUT it does not work with items for children and itemAA itemBB categories.
For it continues to run, I have to do two menus, one for the parent category, the other for the child class.
Do you have a solution to properly configure FLEXIcontent category menu to keep the menu without make another menu for child category ?
Thanks a lot for read and help me .