I think Jayshree is trying to get the category menu expanded with sub -category by default. I'm also interested in this.
Currently, on sidebar, it list only parent category on home page, and if its a child category listing / product page, it list all parent category, with child category of only current active category.
I am also interested in listing all parent category already populated with child categories for each category. I'm working on a theme, and don't know how and what to change in code. Can you help me?
Moreover, I'm also interested in having only a Child Category of current parent category listed on Category page.