This might work:
Code:
RewriteRule ^(.*)/browse.php\?view=&([^/=&]+)=&([^/=&]+)$ \
$1/viewvar/$2var/$3var/ [L]
Some notes:
I broke it in half with a 'backslash to make it easier to see on this page, but I'm not sure if you can do that in .htaccess for real.
If this .htaccess file is in the /websitename/content/ directory, it will not be used in comparisons in /websitename/, so you can be generic with '(.*)' with no danger.
The '?' character is special, so you must escape it to match it.
Your example shows '=&'. Is that right? Do you really want '&'?
I added '[L]' (for last) to indicate that no further tests are to be performed if you get a match. It's optional.