You can't I'm afraid. The LL doesn't care that you lost your job, if you break your lease you will be obligated thru the end of the lease or pay a substantial penalty for breaking the lease. This is why having some money in savings for this is always a good idea to at least cover you for a minimum of 3 months so that you can find something in the meantime.
Your only bet is to find a job in the meantime, even if it's just a temporary job till you can find something permanent.
If you break the lease the landlord can and will come after you for the money, they will turn you over to collections and place a judgement on your credit, which will ruin you for finding another apartment or obtaining a loan in the future.
Your best bet is to talk to the Landlord and see what arrangement they can come up with. chances are they won't work with you, that's how most landlords are, they are there to make money not lose it, but it doesn't hurt to ask.
16 years in property management