Can't seem to figure out how to exclude styles from showing a code

[HMBeaty]

Maybe I'm tired, I dunno lol, but I can't seem to figure out how to exclude style(s) from showing a plugin code.

I've started off with this, which I know is right (I think lol)

PHP Code:

$navnetstyle = explode(',', $vbulletin->options['usml_navnet_styles']); 


and I've already got the plugin so certain usergroups can be excluded by using this:

PHP Code:

$navnetugs = explode(',', $vbulletin->options['usml_navnet_ugrest']);

if (!is_member_of($vbulletin->userinfo, $navnetugs))
{
     code here
} 


But, how do I do it for styles?