What is considered a good reason for bifurcation of trial.

Yes, the violations will be dealt with at other stages.

Can wife be stopped from taking 14 yr 11yr kids with her to move into apartment with no court order & keep them from me.

Short answer, no. File a case.

A filled for divorce because my husband has been abusive , he has 2 creditcards on his name , one he just got last week,

My colleague gives the correct answer; however, all debts must be listed and designated as separate or community property.

Should he get more information

Please refer to Family Code Section 4320.

Can I move out, I will turn 18 n 3 months.

Wait three months, you could risk serious harm to your boyfriend for having sex with a minor. Good luck.

No, it's only to make you each single and has NOTHING to do with the remaining issues.

Hypothetically, would a judge grant a change of venue in a divorce hearing based on hardship for the children/mother?

Where the divorce is pending. You may get it on inconvenient forum, but support requests awarded to you may be the better route.

Immigration and devorce

Your wife seems to have quite an imagination, you should be fine.

Got married in Arkansas, live in Oklahoma in separate households are we legal?

I can't advise you on the law of those states, but not being able to "live together" would to me violate constitutional rights of free association...

I need to get a copy of my kids naturalization papers

You can and should have the passports cancelled and new ones issues. The other documents you can get copies of Stateside.