Without knowing what problems you are actually having, the only thing I can see is that your pattern is looking for the characters "://" immediately after the "href" text and ther are none in your example text. If you remove those additional characters from the pattern, then it will match the text.
If this is not the answer you are looking for, then perhaps you could read the posting guidelines note (the sticky note at the stop of this forum) and provide us with the additional information.
Susan