ci cookies to show popup-add 1 hr interval

hi,
i am new to php, ci and also in this forum.
i want to show a popup-add once an hour. after 1 hour, if the user refreshes the page, the add will be shown again. but if user refreshes the site within 1 hour, the add won't be shown. can i do it using ci built-in class using cookies? or there is any other way. pls suggest...

thanks in advance.