Hey, I was able to fix it by doing something like this:
$id=1;
$post = get_post($id);
$content = apply_filters('the_content', $post->post_content);
$headers = explode('xxx', $content);
-where xxx is the delimiter.
Now I’m able to get the First part of the content like $headers[0] and the second part with $headers[1]
Thank you for your replies! 🙂
Sorry, I forgot, no posts or custom fields or similar stuff, I need it from the main wysiwyg editor…