Add Event Category on Events > Events column

function em_add_category_admin_event_column($args){

	$args['show_ui'] = true;
	$args['show_admin_column'] = true;
	$args['show_in_nav_menus'] = true;

	return $args;
}
add_filter('em_ct_categories','em_add_category_admin_event_column',100,1);