btw, while you got headache for two days, i got it for a day. hehehe just intermezzo

The above code will only output the list of categories. To highlight the current category to which the post belongs, you have to get the category of the current post in your single.php template of your theme and then add the corresponding highlight class to the category.

I would recommend that you do it using WordPress API. If you are going to use WordPress API, then the above code will work.

Thank you very much for this post, this is pretty much what I’m looking for. Actually I’d like to move my wordpress blog to a Joomla platform. I found a plug-in that works only half, it does import the posts and the categories but it does not link the posts to the category.

Do you know how I could achieve this in PHP not using Wordpress API.
Do you think I could use your code:

foreach ($posts as $post) {
$new_cats = array(5,10);
wp_update_post(array('ID'=>$post->ID,'post_category'=>$new_cats));
}

To add the category name to the field post_category since it has been deprecated and then with a simple query retrieve his field and assign it to the post’s category into the Joomla database.

Thanks again for this precious post.

Helio

Thanks a lot! That post really helps to get 50% of my problem solved. May i ask if you could help with the remaining 50%?

I use a category menu to navigate on my blog. I output this menu using :

wp_list_categories(‘child_of=55&sort_column=menu_order&sort_order=asc&title_li=’);

Now, if i look at one of the posts inside that category, that category is not highlighted in the category menu: the current-cat class is not added.

Am i doing something wrong or is this a bug?

Thanks a lot for your insight!

Alexandre

And yeah, “God bless the web”

Nice. The first result from Google searching for:
how to retrieve the category from a wordpress post

The main reason why I posted about this is that, people searching for the same problem could find out the solution. Nice to know that you found it out.

Excellent.

Wow!! It was really a nice feeling to know that my post was of soo much help to you. Your comment has brought a nice big smile on my face and thanks for that

Nice to know that my post was of use to you. I didn’t know about wp_set_post_categories() function. I will try to use it and will update the post about it. Thanks!