How can i help my husband get his citizenship here in the us?

Assuming that you are a US citizen and that your fiancé and his daughter are in the US and entered the country legally, they may be eligible for adjustment of status to permanent residence without leaving the country. In such case, you would file I-130 petitions for both of them, and your then husband and his daughter would file I-485 adjustment of status applications at the same time. The cases would be submitted to the Chicago lockbox of U.S.C.I.S. and you would normally expect to be called for interview within a year.  If you are not a US citizen or there are other complications, you may wish to consult with an immigration lawyer.  Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.