Hi,

I want user post an ad then redirect on Payment page.. its depend on user if they want to make premium or not but atleast they can see option to buy premium ads package..

If they will not select any package then post will also published.

If they select payment option then they make payment and premium ad published

make categories pay for publish
yoursite.com/oc-admin/index.php?page=plugins&action=renderplugin&file=osclass_pay/admin/item.php&go_to_file=_publish.php

i dont want pay for publish..

I want user just see payment option to make premium after publish ad. ( Like you see on other payment plugin they redirect on payment option page )

Its depend on user if they want to make premium or not.

Then u can grab this function from other plugin and into your hook.