require_once($CFG->dirroot . "/blog/locallib.php");

class theme_project_blog_listing extends blog_listing {

public function print_entries() {
//mój nadpisany kod
}

}



require_once($CFG->dirroot . "/blog/renderer.php");

class theme_project_core_blog_renderer extends core_blog_renderer {
    public function render_blog_entry(blog_entry $entry) { ... }

}