Hi,
There is no "group by manufacturer" feature but it is possible to create a sorting by manufacturer.
You can use the sort on the "product_manufacturer_id" or, if you want something related to the manufacturer name ; at this moment the best is to use a filter.
Thanks to the filters, you can sort the product listing by an external data and also create a filtering (only see the product of one selected manufacturer).
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.