How to integrate paypal with codeigniter

[eluser]Ravi ரவி[/eluser]
hai i am new to ci. i want to use paypal in my project. how can i integrate .. i am using this url
to download paypal library from this link http://codeigniter.com/wiki/PayPal_Lib/ . but it shows this page https://github.com/EllisLab/CodeIgniter/wiki.... where i go to download..help me...