Replace the exact word not for related words....

Hi,

My editor have content like bellow.

Test URLs
http://www.apple.com/ 
http://www.apple.com/ipod 
http://www.apple.com/iphone/ 
 
In the above three lines i want to replace http://www.applie.com to some other Url like(http://www.google.com). I Used Replace function to modifed above 3 lines to like bellow
 
http://www.google.com/
http://www.google.com/ipod
http://www.google.com/iphone/