[sweede]

Your issue has nothing to do with remote file calls, but something that i should not have done in the first place.

First, lets get rid of your issue. To do this we're going to have to disable the plugin in SQL itself.
Open up phpmyadmin or some other tool to log into your vbulletin forum database.

Run the following:

UPDATE PREFIX_plugin SET active = 0 WHERE product = "wowhead_itemstats"

Replace "PREFIX_" with the prefix of your tables set in the config.php (usually vbb_)

Once this is done, you should be able to log into your admin panel once again.

I have updated my product so that if you have an existing plugin that already contains a function called "http_get" you wont run into the same issue as OLDrCE.