Regarding Chatbox feature in codeigniter

   

Hi all,

I want to add a chatting module in my dashboard which develops in Codeigniter, but I don't get any idea about how to add a chatting module, which works similarly to skype. Please help me to solve my issue. I'm new to Codeigniter. I'm attaching my screenshot for which I asking this. The design for this chatbox is shown in the screenshot.

Thanks