$cat = get_queried_object()->term_id; // select category id

<?php echo getPostViews(get_the_id()); ?>

function change_wp_nav_menu( $classes, $args, $depth ) { // functions.php
	foreach ( $classes as $key => $class ) {
		if ( $class == "sub-menu" ) {
			$classes[ $key ] = "nested_list hidden";
		}
	}
	return $classes;
}