How do I make a custom dropdown list?

Hi,

I would like to make a custom dropdown list as a crafting menu for my game. It should be able to read data from an XML or similar to get the crafting requirements and what the product is. It should look like the menu in Adventure Capitalist (http://i.imgur.com/uXf5sxp.jpg).

Thanks! <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">

Anyone?

Also I mean a Scrolldown list. I have the idea to put the elements of the list on an extra layer behind a frame so that this layer can scroll. I have to test that out.

Thanks!