Managing record fromt two table

[eluser]abmcr[/eluser]
I have a question for the use of CI: i need to build an admin area for
manage tables with relations one to all (example: photogallery and related photos); what is the best way for
managing them? Actualkly i use Rapyd,(and in Rapyd with an iframe i admin
the related recors into the same form of the father record) but i want to
build a system only with CI.
May be, is most simple to launch two different form: one for the father and
another for managing the related records?

Thank you