I am trying to get a green card for my wife. I an a Citizan born here.

You would need to file Form I-130 on her behalf. Is your wife currently in the United States? If so, she may be able to seek adjustment of status to a lawful permanent resident. If not, she will seek an immigrant visa through consular process. You can read more about family immigration at http://myattorneyusa.com/family-immigration.