This is a release from UCLA about Kahlil Bell being medically cleared for practice:

UCLA senior tailback Kahlil Bell, the team’s leading rusher in 2007, has been cleared for full practice. UCLA opens Fall camp next Tuesday, August 5.

Bell tore the anterior cruciate ligament in his right knee in the first quarter of the Washington State contest (game number eight) and had surgery a few weeks later. He did not participate in Spring Practice.
Bell rushed for 728 yards in UCLA’s first seven games and had already gained 67 yards on four carries, including a 50-yard touchdown, when he was injured in Pullman, WA. He finished with 795 yards and his average of 99.4 yards would have ranked fifth in the Pac-10 in 2007 (he did not play enough games to qualify for the rnakings).
Redshirt freshman tailback Raymond Carter, who injured his right anterior cruciate ligament on the second day of Fall camp a year ago, was cleared for full practice a few weeks ago.