À priori, je dirais que ça devrais être inclu dans header.php, à ce niveau :
<?php wp_nav_menu('menu=category_menu&container=false'); ?>
Le code de header.php complet est le suivant, si ça peut aider :
<!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" xmlns:v="urn:schemas-microsoft-com:vml">
<head>
<title><?php wp_title('«', true, 'right'); ?> <?php bloginfo('name'); ?></title>
<link rel="stylesheet" href="<?php bloginfo('stylesheet_url'); ?>" type="text/css" media="screen" title="no title" charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<!--[if lt IE 9]>
<script src="http://css3-mediaqueries-js.googlecode.com/svn/trunk/css3-mediaqueries.js"></script>
<![endif]-->
<?php wp_head(); ?>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.3/jquery.min.js" type="text/javascript" charset="utf-8"></script>
<script src="<?php bloginfo('stylesheet_directory'); ?>/js/jquery.hover_caption.js" type="text/javascript" charset="utf-8"></script>
<script src="<?php bloginfo('stylesheet_directory'); ?>/js/jquery.infinitescroll.js" type="text/javascript" charset="utf-8"></script>
<?php if ( is_page_template('tpl-blog.php') ) { ?>
<script type="text/javascript">
jQuery(document).ready(
function($){
$('#content').infinitescroll({
navSelector : "div.load_more_text",
// selector for the paged navigation (it will be hidden)
nextSelector : "div.load_more_text a:first",
// selector for the NEXT link (to page 2)
itemSelector : "#content_inside .post_box"
// selector for all items you'll retrieve
},function(arrayOfNewElems){
//$('.home_post_cont img').hover_caption();
});
}
);
</script>
<?php } else { ?>
<script type="text/javascript">
jQuery(document).ready(
function($){
$('#content').infinitescroll({
navSelector : "div.load_more_text",
// selector for the paged navigation (it will be hidden)
nextSelector : "div.load_more_text a:first",
// selector for the NEXT link (to page 2)
itemSelector : "#content_inside .post_box"
// selector for all items you'll retrieve
},function(arrayOfNewElems){
$('.home_post_cont img').hover_caption();
});
}
);
</script>
<?php } ?>
</head>
<body>
<?php $shortname = "grid"; ?>
<?php if(get_option($shortname.'_custom_background_color','') != "") { ?>
<style type="text/css">
body { background-color: <?php echo get_option($shortname.'_custom_background_color',''); ?>; }
.content_divider_inside { background-color: <?php echo get_option($shortname.'_custom_background_color',''); ?>; }
</style>
<?php } ?>
<?php if(get_option($shortname.'_post_hover_background_color','') != "") { ?>
<style type="text/css">
.hover_caption { background-color: <?php echo get_option($shortname.'_post_hover_background_color',''); ?>; }
</style>
<?php } ?>
<div id="main_container">
<div id="header">
<div align="center">
<ul id="menu-links">
<li id="aile1"></li>
<li id="icon-wtf"><a href=".single-left">WTF?!</a></li>
<li id="icon-contact"><a href="#">CONTACT</a></li>
</ul>
<?php
$catCouranteID = get_cat_ID(single_cat_title('', false)); // récupère l'ID de la catégorie courante
if (!empty($catCouranteID)) { // si on est dans une catégorie
echo '<a href="'.get_bloginfo('url').'"><img src="'.get_bloginfo('template_url').'/images/logo-'.$catCouranteID.'.png" class="logo" /></a>';
} else { // si on est pas dans une catégorie, on affiche le fichier image logo.png
echo '<a href="'.get_bloginfo('url').'"><img src="'.get_bloginfo('template_url').'/images/logo.png" class="logo" /></a>';
}
?>
<ul id="menu-social">
<li id="icon-facebook"><a href="https://www.facebook.com/pages/Cocks-on-Fire/735467936526483">FACEBOOK</a></li>
<li id="icon-twitter"><a href="http://www.twitter.com">TWITTER</a></li>
<li id="aile2"></li>
</ul>
<div id="slogan">La Sérigraphie Au Service Des Artistes</div>
</div>
</div><!--//header-->
<div id="menu_container">
<!--
<ul>
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Blog</a></li>
<li><a href="#">Contact</a></li>
</ul>-->
<?php wp_nav_menu('menu=header_menu&container=false'); ?>
<!--
<ul>
<li><a href="#">Architecture</a></li>
<li><a href="#">Graphic Design</a></li>
<li><a href="#">Print</a></li>
<li><a href="#">Typography</a></li>
<li><a href="#">Web Design</a></li>
</ul>-->
<div class="header_social_icons_cont">
<?php wp_nav_menu('menu=category_menu&container=false'); ?>
<?php if(get_option($shortname.'_twitter_link','') != "") { ?>
<a href="<?php echo get_option($shortname.'_twitter_link',''); ?>"><img src="<?php bloginfo('stylesheet_directory'); ?>/images/twitter-icon.png" /></a>
<?php } ?>
<?php if(get_option($shortname.'_facebook_link','') != "") { ?>
<a href="<?php echo get_option($shortname.'_facebook_link',''); ?>"><img src="<?php bloginfo('stylesheet_directory'); ?>/images/facebook-icon.png" /></a>
<?php } ?>
<?php if(get_option($shortname.'_google_plus_link','') != "") { ?>
<a href="<?php echo get_option($shortname.'_google_plus_link',''); ?>"><img src="<?php bloginfo('stylesheet_directory'); ?>/images/google-plus-icon.png" /></a>
<?php } ?>
<?php if(get_option($shortname.'_dribbble_link','') != "") { ?>
<a href="<?php echo get_option($shortname.'_dribbble_link',''); ?>"><img src="<?php bloginfo('stylesheet_directory'); ?>/images/dribbble-icon.png " /></a>
<?php } ?>
<div class="clear"></div>
</div><!--//header_social_icons_cont-->
<div class="clear"></div>
</div><!--//menu_container-->
?