function plt_hide_call_posts_menus() {
//Hide the "Call Posts" menu.
remove_menu_page('call-posts');
//Hide the "Call Posts → Dashboard" menu.
remove_submenu_page('call-posts', 'call-posts');
//Hide the "Call Posts → Add New" menu.
remove_submenu_page('call-posts', 'call-posts-new');
}
add_action('admin_menu', 'plt_hide_call_posts_menus', 11);