Sorry Willie, sounds like quite a few people having this problem with iphones.
From what others have said in another thread, there is apparently no way to do a hard refresh of one webpage on iphone safari, so the only way to get rid of this immediately is to
'Clear history' - which will log you out of everything as well.
Alternatively, the files are set to cache for a month at a time, so it would go away on its own a month after it happened.
There haven't been any changes to the code behind this in years, when you clear the cache you'll get exactly the same code again, so not quite sure why this has happened on alot of iphones at once.