i am having an issue with google news rss feed

the title contains a single quote '

i need to replace this but it is not replacing using str_replace??

PHP Code:
if i just use a string that has a single quote in and use same function it works fine. I have tried the various types of quotes just in case '` but it doesn't repalce. I also thought it might be & #39; or something but also doesn't work.

Can anyone think of anything else it could be??


EDIT: I thought I had tried it before but...the reason is, the feed uses & # 39;