I haven't seen an option, unless someone else more versed with Mala chimes in.
You could use navigation trees. Have one tree setup with a set of emulators and another tree setup with another set of emulators. Then just switch trees from the options window. Well just a thought, because I was planning on having a "kid" friendly tree and an "adults" tree. That way the kids can't accidently switch to a list from the control panel, with the tree, they would need to access the options window which is not accessible from my control panel.