Custom post type page template pagination

Custom post type page template pagination
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<!-- copy and past in Pate Template -->

<?php
global $wp_query;

$wp_query = new WP_Query( array ( 'post_type' => 'items', 'posts_per_page' => '3', 'paged' => get_query_var( 'paged' ) ) );
if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>

<!-- post code here........ -->

<?php endwhile;
endif; ?>


<!-- for show -->
----------------------------------
<div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">&larr;</span> Older posts') ); ?></div>
<div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">&rarr;</span>') ); ?></div>