One validation callback when using arrays

[eluser]vamsee[/eluser]
I understand the what ur trying to do

I used this and worked so u also try it
In Controller

Code:

array(
                     'field'   => 'nric[1]',
                     'label'   => 'NRIC(Part1)',
                     'rules'   => 'trim|exact_length[6]'
                  ),  
               array(
                     'field'   => 'nric[2]',
                     'label'   => 'NRIC(Part2)',
                     'rules'   => 'trim|exact_length[2]'
                  ),  
               array(
                     'field'   => 'nric[3]',
                     'label'   => 'NRIC(Part3)',
                     'rules'   => 'trim|exact_length[4]'
                  ),  
               array(
                     'field'   => 'nric[]',
                     'label'   => 'NRIC',
                     'rules'   => 'required'
                  )