insert month codeigniter and jquery (beginner learner) -

problem when insert month..on segment show 01,02,03 when insert database show 1,2,3,4

how set 01,02,03

view code

    $.post("<?php echo base_url('account/save'); ?>",                 {                    new_sum:$("#test<?php echo $row['br_loc'];?>").val(),                 status:$("#status<?php echo $row['br_loc'];?>").val(),                 sum:$("#sum<?php echo $row['br_loc'];?>").html(),                 year:<?php echo $this->uri->segment(4)?>,                 month:<?php echo $this->uri->segment(3)?>                  },                  function(data) {                 });                                              }); 

controller

public function save() {   $data = array('date_send'=>date("y-m-d"),                 'ac_month'=>$this->input->post('month'),                 'usr_approve'=>$this->session->userdata('username'),                 'status'=>$this->input->post('status'),                 'new_sum'=>$this->input->post('new_sum'),                 'ac_year'=>$this->input->post('year'));         $this->db->insert('account',$data); } 

if ac_month column type int cannot keep leading zeros.

i go string varchar type or store month integer when retrieving data either inject leading zeros or use lpad in sql query.

select lpad(ac_month,4,0) month table