Dropdown menu

Iv'e some suggestions. It would be great if you give option to add drop down items to the main feed. For example, main feed name is "News" and there's an arrow near it. When we click the arrow, more items will appear like "automotive", "politics" etc etc. Also, there should be an option to choose should these extra items update automatically or should it update only when the user open(click) that extra item. Just like we see in websites. Sub menu for main menu. Right now we can't categorize a feed. It'll be great if you can add this.