Экстра навигация с ЧПУ и поддержкой ajax

Установка Экстра навигация:

1. Открываем engine\modules\show.full.php
   Находим:
   $tpl->set( '{short-story}', stripslashes( $row['short_story'] ) );
   
   Вставляем ниже:
   //-------------- НАВИГАЦИЯ --------//
   
       if( $config['ajax'] ) {
           $newnavig = "<select onchange=\"DlePage('newsid='+this.value); return false;\">";
       }
      
       else {
           if ( $config['allow_alt_url'] == "yes" ) {
               $newnavig = "<select onchange=\"javascript:window.location='".$config['http_home_url'] . "'+this.value+'.html'\">";
           }
           else {
               $newnavig = "<select onchange=\"javascript:window.location='$PHP_SELF?newsid='+this.value;\">";
           }
       }
   
       $db->query ("SELECT id, title, date, flag, alt_name FROM " . PREFIX . "_post WHERE category=" . $row['category'] . " AND approve='1' ORDER BY `date` DESC LIMIT 0, 50");
       while ( $nav_row = $db->get_row() ) {
           $nav_row['date'] = strtotime( $nav_row['date'] );
           $row['category'] = intval( $row['category'] );
           $nav_selected = ( $nav_row['id'] == $row['id'] ) ? "selected disabled" : "";
          
           if ( $config['allow_alt_url'] == "yes" && ! $config['ajax']) {
          
               if( $nav_row['flag'] and $config['seo_type'] ) {
          
                   if( $row['category'] and $config['seo_type'] == 2 ) {
                       $newnavig .= "<option value = \"" . get_url( $row['category'] ) . "/" . $nav_row['id'] . "-" . $nav_row['alt_name'] . "\"" . $nav_selected . ">" . $nav_row['title'] . "</option>";
                   }
                   else {
                       $newnavig .= "<option value = \"" . $nav_row['id'] . "-" . $nav_row['alt_name'] . "\"" . $nav_selected . ">" . $nav_row['title'] . "</option>";
                   }
               }
               else {
                   $newnavig .= "<option value = \"" . date( 'Y/m/d/', $nav_row['date'] ) . $nav_row['alt_name'] . "\"" . $nav_selected . ">" . $nav_row['title'] . "</option>";
               }
           }
           else{
               $newnavig .= "<option value = \"" . $nav_row['id'] . "\"" . $nav_selected . ">" . $nav_row['title'] . "</option>";
           }
       }
   
       $newnavig .= "</select>";
   
       $tpl->set( '{navigations}', $newnavig );
   
   //-------------- НАВИГАЦИЯ --------//
2. Открываем шаблон "Статья целиком | fullstory.tpl" и в нужном месте вставляем {navigations}.