[jsalvit]

I figured out a way to fix it. I do a string replace for the original src= and replace it with my root relative image src.

I replaced your line

echo $vbridge[vb_parser]->do_parse($reply->pagetext, false, true);

with this:

echo str_replace("src=\"", "src=\"/forum/", $vbridge[vb_parser]->do_parse($reply->pagetext, false, true));