There really is no reasoning behind what tab I put what in, it's just my old bank in the same order basically, just tabbed now so I don't have to scroll.
Tab 1:

In short it's just a miniature of my old bank, various sections within it. Currencies, capes, logs, ore, etc. You should be able to see clearly items close together are related and didn't get their own tab.
Tab 2:

Magic tab, anything related to runes, whatever.
Tab 3:

Shane's love found a place of its own in my bank.
Tab 4:

Crafting paraphernalia.
Tab 5:

Herbs, potions, seconds, and strange fruit in there for the hell of it.
Tab 6:

Combat junk, it's all getting dusty.
Tab 7:

I don't range, I don't really like it. Duno why it got its own tab.
Tab 8:

Summoning stuff, not much for it but it got its own tab. I think because in the old bank, Summoning stuff was scattered about towards the end; this is just nicer I guess.
Tab 9:

I chose this tab's image to be similar to the idea of the Sandbox, this is just junk I haven't tossed/don't want to toss but I don't use much or at all.