Can't read form values

So you say the serialize is working as it should.
What does your var_dump on the input->post show?

Code:

array(0) { }

 and.

Code:

Error Number: 1048

Column 'agency_name' cannot be null

INSERT INTO `agency` (`agency_name`, `category`, `address`, `acronym`) VALUES (NULL, NULL, NULL, NULL)

Filename: C:/xampp/htdocs/csc/system/database/DB_driver.php

Line Number: 691