Master & Detail records in same page?

HI all,

I'm very new to codeigniter so please forgive my ignorance. 
I have a master table (say orders) and a detail table ( say order_details).
I'm actually using the sample database from mysql to check this.
I want to have a page that shows all the orders  (Paginated and searchable if possible) I have and 
when I select an order to have a (new page ?  pop-up page ? I prefer same page if possible) 
to show all the order_details lines that are relevant to my  selected order .
I understood from reading and googling, that unless I use javascript some parts of the above I will
not to be able to do with codeigniter .  If anyone has an example  case like mine to
I want some hint?  example code ?  to start  digging.

Thanks In advance
George