I use rsync to download only the html documents in the directories to my local machine. Then I use my favorite utility (any html editor will do) to do a find and replace and then use rsync to only re-upload the changed files.
SSH into your server,
To download the files.
Code:
rsync -avCP --progress --stats --exclude "jpg" --exclude "mpg" USERNAME@YOURDOMAIN.com:/SERVERPATH/TO/DIRECTORIES/ /YOURCOMPUTERS/LOACL/PATH
To upload the files.
Code:
rsync -avCP --progress --stats --exclude "jpg" --exclude "mpg" /YOURCOMPUTERS/LOACL/PATH/ USERNAME@YOURDOMAIN.com:/SERVERPATH/TO/DIRECTORIES