It was not immediately clear whether the sentences will run concurrently.
According to media reports, Kati is also one of seven men charged for a string of murders at Glebelands.
The hostel, which is home to more than 20,000 people, has been plagued by hit-style murders. According to one researcher, there have been more than 100 deaths at or linked to the hostel since an outbreak of violence three years ago.
During the Moerane commission of inquiry to probe political killings in KwaZulu-Natal‚ witnesses described the hostel as a haven for hitmen and criminals.