I cant quite figure out how to display SubCategories titles under the Categories Titles

I have a structure like so

Category> Sub Cat > Sub Cat > Items List
Recipes > Salads > Salad Dressing > Balsamic Vinaigrette

imm.io/media/10/10N6.png

Is there a way to display Subcats In Cat List like so:

imm.io/media/10/10Ni.png (Salad Dressing > View Items)

I'm using k2 2.2

Here is a live page: www.chefrli.com/recipes

After 8 years still I have the same question :D

Tried:
www.joomlaworks.net/forum/k2-en/45182-display-category-and-sub-categories-titles and
www.joomlaworks.net/forum/k2-en/36753-solved-k2-category-list-with-subcategories-problem
and no luck.

I need to have

PRIMARY CATEGORY TITLE
~ FIRST SUB CAT TITLE
~~ ITEM 1
~~ ITEM 2
~~ ITEM 3

~ SECOND SUB CAT TITLE
~~ ITEM 1
~~ ITEM 2
~~ ITEM 3

Any chance for this layout without modding the php?