Adding URL Parameters

I'm surprised I haven't found any topics on this. I've noticed that manufacturers and product URL's are using the following format for SEO: website.com/this-is-a-product or website.com/this-is-a-manufacturer. This is bad for analytics and reporting because you can't differentiate a brand from a product unless you manually tag it. So I'm wondering if anyone has tackled this. I'd like to add parameters as shown: website.com/m/this-is-a-manufacturer and website.com/p/this-is-a-product.