I now live in the Philippines (3 years) and was divorced 6 years ago... I plan on remarrying a nice lady here in the Philippines. My question is whether she would be eligible for some of my SSDI benefits if I pass away? I am only 52 years old.

She would have to be between 50 and 60 when you die and be disabled according to SS definition.
But I don't think she would be eligible at all as a non US citizen.