Category 1

Site 2	http://www.blah.com	Another site
Site 3	http://www.blah.com

Category 2

Site 4	http://www.blah.com	Interesting
Site 5	http://www.blah.com	Worth a visit
Site 6	http://www.blah.com

Category 3

Site 7	http://www.blah.com	Highly recommended
Site 1	http://www.blah.com