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<?php
function cake_content_nav( $nav_id ) {
	global $wp_query;

	if ( $wp_query->max_num_pages > 1 ) : ?>
		<nav id="<?php echo $nav_id; ?>" class="content_nav clearfix">
			<ul>
				<li class="nextPost"><?php previous_posts_link( __( '← newer ', 'cake' ) ); ?></li>
				<li class="prevPost"><?php next_posts_link( __( 'older →', 'cake' ) ); ?></li>
			</ul>					
		</nav>
	<?php endif;
}?>