Hi,
That feature is not yet in HikaMarket but is in our TODO list for the long term.
Because the brands are shared by every vendors ; we currently don't want to let vendors create them.
When more feature will be implemented about brands and vendors ; we might activate the feature to let vendors create brands and modify only their own (and not modify brands which could affect other vendors).
For the moment, the best is to just let the administrator manage the brands.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.