N.H. Rev. Stat. Ann. § 490-F:18

During the implementation of the circuit court, references in statutes involving the jurisdiction of the circuit court to the probate or district courts or to the judicial branch family division shall be deemed to include the circuit court. Following the full implementation of the circuit court, those references shall be deemed to be to the New Hampshire circuit court where it has exclusive jurisdiction of a subject matter and to the superior court and circuit court where the circuit court has concurrent jurisdiction with the superior court.