Remove category from url

I use polylang on my site. Url is something like the following form: http://site.com/category/news for english and http://site.com/ru/category/localized_name for other languages. It’s work fine.
I want to remove ‘category’ form url. I downloaded and installed WP No Category Bass plugin. Its work fine on base language, but on other laguages no select posts by category. I see all post for selected language. Help please.

Small fixes for your code:

// meta in the html head section
	function wp_head() {
		// outputs references to translated pages (if exists) in the html head section
		foreach ($this->get_languages_list() as $language) {
			if ($language->slug != $this->curlang->slug && $url = $this->get_translation_url($language))
                            //!Ad >> $url may be error object
                            if (is_string($url))
                            // << !Ad
				printf("<link hreflang='%s' href='%s' rel='alternate' />\n", esc_attr($language->slug), esc_url($url));
		}
	}

http://wordpress.org/extend/plugins/polylang/