Menu with category 2 category combined

Question

I need to create 2 category menu in my wordpress site. One in the sidebar, one in the content. In the content I need to have only ingredient menu, so

• fish

• chicken

...and so on.

In the sidebar I need to have

• first dishes

   - fish 
  
   - chicken
  

• second dishes

     - fish
  
     - chicken
  

  Which is the best way to achieve this?

Better if automatic add when I add categories.

If I use the subcategories I'll have 2 fish and 2 chicken categories and I don't think is the best way. If I use 2 categories I have in the first dishes and second dishes all ingredient without distinction. You have some advice?

Answer 1

Please explain the logics of 2 menus displayed on same page. I believe you menu structure is as follows:

first dishes
 - fish 
 - chicken
second dishes
 - fish
 - chicken

So your main categories are ones like "first dishes" and "second dishes" How do you want to show main categories - as separate menus?

And same question to sub menus like "fish", "chicken" There will be several menus like:

1) Related to "second dishes" - fish - chicken

2) Related to "second dishes" - fish - chicken

Or theme menus will be displayed on some recipe posts, and each post will have category relation