Both players have attracted interest from Europe's top clubs, with a number of suitors watching the duo rise through the French club's youth system.
"He (Stambouli) will leave at the end of the season. And Cabella will probably go too," Nicollin said in an interview with French newspaper Le Midi Libre.
Stambouli's contract expires in the summer of 2015, while Cabella's runs out in the following year, with Montpellier looking to make the most out of the interest before both players are allowed to leave on free transfers.
Cabella has recently attracted interest from Manchester United, who will be expected to make a number of signings during the summer as manager David Moyes aims to revamp his squad.