Pokaż jeszcze raz kod pliku header.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes() ?>>
<head profile="http://gmpg.org/xfn/11">
<title><?php bloginfo('name'); if ( is_404() ) : _e(' » ', 'sandbox'); _e('Not Found', 'sandbox'); elseif ( is_home() ) : _e(' » ', 'sandbox'); bloginfo('description'); else : wp_title(); endif; ?></title>
<meta http-equiv="content-type" content="<?php bloginfo('html_type') ?>; charset=<?php bloginfo('charset') ?>" />
<meta name="description" content="<?php bloginfo('description') ?>" />
<meta name="generator" content="WordPress <?php bloginfo('version') ?>" /><!-- Please leave for stats -->
<style type="text/css" media="all"> @import url(<?php bloginfo('template_url'); ?>/css/reset.css); @import url(<?php bloginfo('template_url'); ?>/css/generic.css); </style>
<style type="text/css" media="print"> @import url(<?php bloginfo('template_url'); ?>/css/print.css); </style>
<link rel="stylesheet" type="text/css" href="<?php bloginfo('stylesheet_url'); ?>" />
<link rel="alternate" type="application/rss+xml" href="<?php bloginfo('rss2_url') ?>" title="<?php echo wp_specialchars(get_bloginfo('name'), 1) ?> <?php _e('Posts RSS feed', 'sandbox'); ?>" />
<link rel="alternate" type="application/rss+xml" href="<?php bloginfo('comments_rss2_url') ?>" title="<?php echo wp_specialchars(get_bloginfo('name'), 1) ?> <?php _e('Comments RSS feed', 'sandbox'); ?>" />
<link rel="pingback" href="<?php bloginfo('pingback_url') ?>" />
<?php wp_head() ?>
</head>
<body class="<?php sandbox_body_class() ?>">
<div id="wrapper" class="hfeed">
<div id="header">
<h1 id="blog-title"><a href="<?php echo get_option('home') ?>/" title="<?php bloginfo('name') ?>" rel="home"><?php bloginfo('name'); ?></a></h1>
<div id="blog-description"><?php bloginfo('description') ?></div>
</div><!-- #header -->
<div id="access">
<div class="skip-link"><a href="#content" title="<?php _e('Skip navigation to the content', 'sandbox'); ?>"><?php _e('Skip to content', 'sandbox'); ?></a></div>
<div id="menu">
<ul>
<li class="page_item"><a href="http://myslowicemoichmarzen.pl/">Strona główna</a></li>
<li class="page_item page-item-17"><a href="http://myslowicemoichmarzen.pl/?page_id=17">O nas</a></li>
<li class="page_item page-item-19"><a href="http://myslowicemoichmarzen.pl/?page_id=19">Redakcja</a></li>
<li class="page_item page-item-21"><a href="http://myslowicemoichmarzen.pl/?page_id=21">Kontakt</a></li>
</ul>
</div>
Nie kazałem Ci usuwać tego: </div><!-- #access --> – stąd ten problem.