disable inline related post on certain categories

add_filter( 'jnews_force_disable_inline_related_post', 'disable_inline_related_in_categories', 99 );


function disable_inline_related_in_categories( $flag ) {
    $category_lists = array( 'editorial', 'opinion' ); /* change this with your list of category slug */
    if ( is_single() && has_category( $category_lists ) ) {
        return true;
    }
    return $flag;
}