qTranslate - create tabs for language versions

gistfile1.php

/**   
 * qTranslate tabbed language chooser
 */

//make enabled languages visible for javascript
function register_qtranslate_var() {
    global $q_config;
    wp_localize_script('jquery', 'Qtranslate', array(
        'enabled_languages' => $q_config['enabled_languages']
        , 'current_language' => qtrans_getLanguage()
            )
    );
}

add_action('admin_enqueue_scripts', 'register_qtranslate_var');

function hide_nonactive_language() {
    ?>
    <style type="text/css">
        <!--
        .qtrans_version
        {        
            display: none;
        }
        .qtrans_version.<?php echo qtrans_getLanguage(); ?>
        {
            display: block;
        }        
        -->
    </style>
    <?php
}
add_action("admin_head", 'hide_nonactive_language');

function get_lang_menu($id = "") {
    global $q_config;
    $ret = '<h2 class=\"nav-tab-wrapper\">';
    foreach (qtrans_getSortedLanguages() as $language) {      
        //qtrans_convertURL was always returning lang=en for me, so had to fix that with this dirty fix
        $fixed_url = preg_replace("/lang=[a-zA-Z][a-zA-Z]/", "lang=".$language, qtrans_convertURL('', $language));
        $ret .='<a href=\"' . $fixed_url . '\"';
        if ($language == $q_config['language'])
            $ret .=' class=\"active nav-tab nav-tab-active qtrans_flag_' . $language . ' qtrans_flag_and_text\" title=\"' . $q_config['language_name'][$language] . '\"';
        else 
            $ret .=' class=\"nav-tab qtrans_flag_' . $language . ' qtrans_flag_and_text\" title=\"' . $q_config['language_name'][$language] . '\"';
        $ret .='><span>' . $q_config['language_name'][$language] . '</span></a>';
    }
    $ret .='</h2>';
    return $ret;
}

function add_tabbed_languages_script() {   
    $screen = get_current_screen();
    if ($screen->base === 'post'){
        $menu = get_lang_menu();
    }
    else{
        $menu = '';
    }
        echo '<script type="text/javascript">
/* <![CDATA[ */        
	jQuery(".wrap").prepend("'.$menu.'");
        jQuery(document).ready(function() {
            jQuery(".qtrans_title_input").each(function(){
                var item_id = jQuery(this).attr("id");
                var lang_regexp = /qtrans_title_(.+)/g;
                var match = lang_regexp.exec(item_id);
                var lang = match[1];
                jQuery(this).closest(".postarea").addClass("qtrans_version "+lang);                                    
            });
            jQuery("#qtrans_select_"+Qtranslate.current_language).click();
            jQuery.each(Qtranslate.enabled_languages, function(value){
                jQuery("#qtrans_select_"+Qtranslate.enabled_languages[value]).hide();
            });
    });
/* ]]> */
    </script>'; 
}
add_action("admin_footer", 'add_tabbed_languages_script');