dynamic input field array validation.

note the brackets after the field name value

PHP Code:

       $formrules = array(
           array(
               'field' => 'fault[]',
               'label' => 'the fault field',
               'rules' => 'trim|max_length[40]'
           ),
        // and whatever else you need 
        );
        $this->form_validation->set_rules($formrules);

       if ($this->form_validation->run() == true)
       {return true; }
       else
       { return false; } 


Thanks mate this works.