gistfile1.txt

add_filter( 'the_content', 'generate_move_page_links' ); 
 
function generate_move_page_links( $content ) { 

	$page_links = wp_link_pages( array(
		'before' => '<div class="custom-page-links page-links">' . __( 'Pages:', 'generate' ),
		'after'  => '</div>',
		'echo' => 0,
		'link_before'      => '<span>',
		'link_after'       => '</span>',
	) );

    	return $content . $page_links;
}