It can be categories of all the holidays and site events and all the items types + creating your own categories like you can do now.

Also, is it possible to make an option to Auto categorising the items by items types, rarities, holidays and events, and even by shops? you choose what you want. it can be a gold account option or by paying CSC.

What do you think?

What do you mean by item types? Do you mean the kinds you see from the drop-down menu in a shop or gallery at the top of the page? If so, that's a lot of item types. ;l All of the holidays and site events would be overkill imo. Not all galleries act like vaults, which is where I think this feature should go were it to be a feature. Otherwise, if you want to do a gallery of site events or holidays, you can manually add in those categories though I think the greater problem there is running out of categories (there's another suggestion thread about that made recently).

Items types like plushies, weapons, wears and all the rest. And there are no more than 10 holidays and events (I think).

I don't mean it to act like a Vault, but more as a way to organize the gallery in easy way instead of going to each item one-by-one and adding it to a category, so instead of doing it, in one click, if you want of course, you can organize and categorize the gallery in this way..

Isn't that what the "item type" and "item use" drop down menus are for?