Hide non-pro subsites from BP Sites List - WPMU Pro Sites

code.php

<?php

add_filter( 'bp_blogs_get_blogs', 'bp_blogs_get_blogs_cb', 99, 2 );
function bp_blogs_get_blogs_cb( $blogs, $r ) {
    
    foreach( $blogs['blogs'] as $key => $blog ){
        if( ! is_pro_site( $blog->blog_id ) ) {
            unset( $blogs['blogs'][$key] );
            $blogs['total']--;
        }
        
    }
    
    return $blogs;
}