How to format links in reports to be clickable URLs

How to format links in reports to be clickable URLs

Prior C5 upgrade when I was using single line field it would display links as a clickable URLs in reports. After upgrade those links are no longer clickable. I am also aware there is Url field type, but I don't want to migrate all my fields to new type, as it is massive amount of work and code change. 

Anyone knows of any quick workaround in C5 to get links in single line field to be clickable in reports?