Print time in am/pm format.

[eluser]Unknown[/eluser]
Hello...
i have implement date/time functionality in my module in codeigniter.
it's working and print time in AM formt not in PM format,if i will select time of PM,it's not working...
here is my code...

"$this->db->select("DATE_FORMAT(tbl_opportunity_changes.updated_date, '%d-%m-%Y %h:%i:%s %p') as updated",False);"

this line of code will print time in AM format...

plz....help...
thanks in advance...