Prey (2007)

Synopsis: Tom Newman (Peter Weller) can't join his family on their first African adventure vacation due to urgent business obligations, but hopes the trip will provide a chance for his son and daughter to bond with his new young wife, Amy (Bridget Moynahan). Their ranger, Brian, decides to add some extra thrills and adventure to their trip and takes them "off roading." All is well until Amy and the two kids become lost in a labyrinthine game reserve and begin to be stalked by savage lions who won't quit until they have dinner.     Source: VideoETA.com