brands in hierarchical style and using filter

-- HikaShop version -- : HikaShop Business 2.2.2

I use brands in a two-level hierarchical style.
for example:
A-apple,orange, and persimmon
B-pesi, zeki, and hepi
C-x and z
Here is the problem, it will only show the children brands and overlook the parent ones if I use dynamic display in filter. When i click on certain page, the filter will show up, for example, apple and orange directly.
I'm wondering if it is possible to use filter like this:
filter1(A,B,C) and filter2 will depend on filter1, as following example
filter1(A) , then filter2 (apple, orange, persimmon)

thank you very much!
best,
gmfndc

Hi,

By default the system don't allow this kind of things.
To have this behavior it will require custom code, so good php knowledges.