I'm not sure if this feature will become generally available but the 1P for Teams service give you the ability to create custom category templates. I just created a new Bookmarks category and the template contains just a URL field. I then created a new vault just for bookmarks. Perhaps you could use something like this to import your bookmarks and manage them within 1P.
Even if it does, I can't say when that might be. But we are definitely hoping to expand support for custom templates if all goes well with the beta in 1Password Teams Pro accounts. Cheers! :)