diff --git a/themes/ITStudioMainSite/functions.php b/themes/ITStudioMainSite/functions.php
index 770c4ae..9741f64 100644
--- a/themes/ITStudioMainSite/functions.php
+++ b/themes/ITStudioMainSite/functions.php
@@ -18,6 +18,24 @@ function itstudio_theme_setup() {
 }
 add_action('after_setup_theme', 'itstudio_theme_setup');
 
+function itstudio_open_honor_menu_item_in_new_tab($atts, $item, $args) {
+    $href = isset($atts['href']) ? (string) $atts['href'] : '';
+    $host = wp_parse_url($href, PHP_URL_HOST);
+
+    if ($host !== 'honor.itouc.cn') {
+        return $atts;
+    }
+
+    $atts['target'] = '_blank';
+    $rel = isset($atts['rel']) ? (string) $atts['rel'] : '';
+    $rel_tokens = preg_split('/\s+/', trim($rel), -1, PREG_SPLIT_NO_EMPTY);
+    $rel_tokens = array_unique(array_merge($rel_tokens, array('noopener', 'noreferrer')));
+    $atts['rel'] = implode(' ', $rel_tokens);
+
+    return $atts;
+}
+add_filter('nav_menu_link_attributes', 'itstudio_open_honor_menu_item_in_new_tab', 10, 3);
+
 function itstudio_get_site_content_defaults() {
     return array(
         'footer_links' => array(