Hi,
The short description is only displayed if you have changed the product page layout from "default" to "tabular", so switch back to default and you won't see it on the product page.
Also, you could always hide it with a bit of CSS:
www.hikashop.com/support/documentation/1...ize-the-display.html
The tags are only useful to be displayed on the product page. If you don't want the tags on the product page, then simply don't set tags in your products.
The category of the product isn't displayed on the product page by HikaShop, so I'm not sure what you're talking about.