vBCMS - Detect articles in section X

[LOGECT]

Hello

I would like to use some different style/lang for my articles in section for example X than Y, so i need to separate them, the only way i find was the following code and the problem is that i have to writ the $_GET['r'] == x manually for every each article.
I believe that there should be a way to detect all articles in section X instant of writing the numbers manually.

Any help would be great.
Thank you

if (( $_GET['r'] == x OR $_GET['r'] == xx OR $_GET['r'] == xx) && (THIS_SCRIPT == 'vbcms'))  
{
    Do somthing

}
else
{
    Do somthing

}