Can go part of the way with regular expressions putting in rich text links.
Converted the following to clickable links:
Pattern: (\w+\://\S+)
(
and )
capture matching text to be used in the $1
in the replacement.
\w+
matches a word of one or more letters.
\:
matches a colon.
//
matches two slashes.
\S+
matches one or more non-spaces.
Replace with: [u][url=$1]$1[/url][/u]
$1
is the captured expression from above.
The rest is rich text to show as a url. I added [u]
underline to make it visible, could also put in colours.