[Zachery]

I did this a bit ago, instagram has an API, a full bbcode could be written, but that is outside of my time available. This is for the custom bbcode system.

The tag should be ig (or whatever you want really)

Here is the html that goes into the bbcode box

<a href="http://instagram.com/p/{param}"><img src="http://instagr.am/p/{param}/media/" /></a>

So, if a url was

http://instagram.com/p/123abc456fg

You'd need to take the end part of that url, and put it between the [ig] tags

so [ig]123abc456fg[/ig]

Should work. If you wanted the full url http://instagram.com/p/123abc456fg parsed inside of the [ig] tags that would take more time and effort to write a bbcode class/etc.