And to assume that the OP cannot possibly be exaggerating to get out of taking classes he doesn't want to take is also wrong.
And to assume that the OP cannot possibly be exaggerating to get out of taking classes he doesn't want to take is also wrong.
Let's just say I think it's such a stretch that you're about to fall on your backside and leave it at that.
As this is a criminal case, the OP can "assume" things about DV classes but his assumptions are likely to land his posterior inside a jail cell. Unless he has actual knowledge of what is going to be presented in those classes, and can provide documentation from his mental health care providers that the known content could trigger his PTSD and cannot be accommodated within the program, he can expect that his probation officer is going to continue to expect him to take those classes and that the sentencing court will treat his failure to attend as a probation violation. If he has a valid, psychological reason not to attend the classes, that's something he needs to establish to the satisfaction of his probation officer and the court, and it's something he should do well in advance of being brought back to court for a probation violation.