Just use the Adminimize plugin!
If you don’t wanna, here are some functions
function remove_menus(){
if (!current_user_can('administrator')) {
remove_menu_page( 'index.php' );
remove_menu_page( 'upload.php' );
remove_menu_page( 'vc-welcome' );
remove_menu_page( 'tools.php' );
remove_menu_page( 'edit.php?post_type=vacancy' );
remove_menu_page( 'edit.php?post_type=branch' );
remove_menu_page( 'edit.php?post_type=person' );
remove_menu_page( 'edit.php?post_type=page' );
remove_menu_page( 'peak6-general-settings' );
}
}
add_action( 'admin_menu', 'remove_menus', 20 );
add_action( 'admin_bar_menu', 'remove_wp_logo', 999 );
function remove_wp_logo( $wp_admin_bar ) {
$wp_admin_bar->remove_node( 'wp-logo' );
}