diff --git a/module/caselib/control.php b/module/caselib/control.php
index 9e4c245d3a..3506b195e9 100644
--- a/module/caselib/control.php
+++ b/module/caselib/control.php
@@ -54,7 +54,7 @@ class caselib extends control
 
         $libraries = $this->caselib->getLibraries();
         $libID     = $this->caselibZen->saveLibState(0, $libraries);
-        $this->caselib->setLibMenu($libraries, $libID);
+        $this->caselibZen->setLibMenu($libraries, $libID);
 
         $this->view->title = $this->lang->caselib->common . $this->lang->colon . $this->lang->caselib->create;
         $this->display();
@@ -90,7 +90,7 @@ class caselib extends control
         /* Set lib menu. */
         $libraries = $this->caselib->getLibraries();
         $libID     = $this->caselibZen->saveLibState($libID, $libraries);
-        $this->caselib->setLibMenu($libraries, $libID);
+        $this->caselibZen->setLibMenu($libraries, $libID);
 
         $this->view->title = $libraries[$libID] . $this->lang->colon . $this->lang->caselib->edit;
         $this->view->lib   = $this->caselib->getById($libID);
@@ -164,7 +164,7 @@ class caselib extends control
         $this->caselibZen->setBrowseSessionAndCookie($libID, $browseType, $param);
 
         /* Set lib menu. */
-        $this->caselib->setLibMenu($libraries, $libID);
+        $this->caselibZen->setLibMenu($libraries, $libID);
 
         /* Set module and query id. */
         $moduleID = ($browseType == 'bymodule') ? $param : ($browseType == 'bysearch' ? 0 : ($this->cookie->libCaseModule ? $this->cookie->libCaseModule : 0));
@@ -242,7 +242,7 @@ class caselib extends control
         /* Set lib menu. */
         $libraries = $this->caselib->getLibraries();
         $libID     = $this->caselibZen->saveLibState($libID, $libraries);
-        $this->caselib->setLibMenu($libraries, $libID);
+        $this->caselibZen->setLibMenu($libraries, $libID);
 
         $type         = 'feature';
         $stage        = '';
@@ -318,7 +318,7 @@ class caselib extends control
         if(empty($libraries)) $this->locate(inlink('create'));
 
         /* Set lib menu. */
-        $this->caselib->setLibMenu($libraries, $libID);
+        $this->caselibZen->setLibMenu($libraries, $libID);
 
         $this->view->title            = $libraries[$libID] . $this->lang->colon . $this->lang->testcase->batchCreate;
         $this->view->libID            = $libID;
@@ -343,7 +343,7 @@ class caselib extends control
 
         /* Set lib menu. */
         $libraries = $this->caselib->getLibraries();
-        $this->caselib->setLibMenu($libraries, $libID);
+        $this->caselibZen->setLibMenu($libraries, $libID);
 
         $this->loadModel('testcase');
         $this->view->title      = $lib->name . $this->lang->colon . $this->lang->caselib->view;
@@ -557,7 +557,7 @@ class caselib extends control
         $libraries = $this->caselib->getLibraries();
         if(empty($libraries)) $this->locate(inlink('create'));
 
-        $this->caselib->setLibMenu($libraries, $libID);
+        $this->caselibZen->setLibMenu($libraries, $libID);
 
         $caseLang   = $this->lang->testcase;
         $caseConfig = $this->config->testcase;
diff --git a/module/caselib/model.php b/module/caselib/model.php
index 84823b0913..bbd7cf2cd5 100644
--- a/module/caselib/model.php
+++ b/module/caselib/model.php
@@ -13,40 +13,6 @@
 <?php
 class caselibModel extends model
 {
-    /**
-     * Set library menu.
-     *
-     * @param  array  $libraries
-     * @param  int    $libID
-     * @access public
-     * @return void
-     */
-    public function setLibMenu($libraries, $libID)
-    {
-        /* Set case lib menu. */
-        $products = $this->loadModel('product')->getPairs();
-        if(!empty($products) and $this->session->product) $this->loadModel('qa')->setMenu($this->session->product);
-        if(empty($products)) $this->loadModel('qa')->setMenu();
-
-        $this->lang->qa->menu->caselib['subModule'] .= ',testcase';
-
-        if($libraries)
-        {
-            $libName = '';
-            if(!isset($libraries[$libID])) $libName = $this->dao->select('name')->from(TABLE_TESTSUITE)->where('id')->eq($libID)->fetch('name');
-            $currentLibName = zget($libraries, $libID, $libName);
-            setCookie("lastCaseLib", $libID, $this->config->cookieLife, $this->config->webRoot, '', false, true);
-
-            $dropMenuLink = helper::createLink('caselib', 'ajaxGetDropMenu', "objectID=$libID&module=caselib&method=browse");
-
-            $output  = "<div class='btn-group header-btn' id='swapper'><button data-toggle='dropdown' type='button' class='btn' id='currentItem' title='{$currentLibName}'><span class='text'>{$currentLibName}</span> <span class='caret' style='margin-top: 3px'></span></button><div id='dropMenu' class='dropdown-menu search-list' data-ride='searchList' data-url='$dropMenuLink'>";
-            $output .= '<div class="input-control search-box has-icon-left has-icon-right search-example"><input type="search" class="form-control search-input" /><label class="input-control-icon-left search-icon"><i class="icon icon-search"></i></label><a class="input-control-icon-right search-clear-btn"><i class="icon icon-close icon-sm"></i></a></div>';
-            $output .= "</div></div>";
-
-            $this->lang->switcherMenu = $output;
-        }
-    }
-
     /**
      * Get caselib info by id.
      *
diff --git a/module/caselib/zen.php b/module/caselib/zen.php
index 535b536f69..fdad652eac 100644
--- a/module/caselib/zen.php
+++ b/module/caselib/zen.php
@@ -2,6 +2,45 @@
 declare(strict_types=1);
 class caselibZen extends caselib
 {
+    /**
+     * 设置用例库菜单。
+     * Set library menu.
+     *
+     * @param  array  $libraries
+     * @param  int    $libID
+     * @access public
+     * @return void
+     */
+    public function setLibMenu(array $libraries, int $libID): void
+    {
+        /* Set case lib menu. */
+        $products = $this->loadModel('product')->getPairs();
+        if(!empty($products) and $this->session->product) $this->loadModel('qa')->setMenu($this->session->product);
+        if(empty($products)) $this->loadModel('qa')->setMenu();
+
+        $this->lang->qa->menu->caselib['subModule'] .= ',testcase';
+
+        if($libraries)
+        {
+            $libName = '';
+            if(!isset($libraries[$libID]))
+            {
+                $lib     = $this->caselib->getByID($libID);
+                $libName = $lib ? $lib->name : '';
+            }
+            $currentLibName = zget($libraries, $libID, $libName);
+            setCookie("lastCaseLib", (string)$libID, $this->config->cookieLife, $this->config->webRoot, '', false, true);
+
+            $dropMenuLink = helper::createLink('caselib', 'ajaxGetDropMenu', "objectID={$libID}&module=caselib&method=browse");
+
+            $output  = "<div class='btn-group header-btn' id='swapper'><button data-toggle='dropdown' type='button' class='btn' id='currentItem' title='{$currentLibName}'><span class='text'>{$currentLibName}</span> <span class='caret' style='margin-top: 3px'></span></button><div id='dropMenu' class='dropdown-menu search-list' data-ride='searchList' data-url='$dropMenuLink'>";
+            $output .= '<div class="input-control search-box has-icon-left has-icon-right search-example"><input type="search" class="form-control search-input" /><label class="input-control-icon-left search-icon"><i class="icon icon-search"></i></label><a class="input-control-icon-right search-clear-btn"><i class="icon icon-close icon-sm"></i></a></div>';
+            $output .= "</div></div>";
+
+            $this->lang->switcherMenu = $output;
+        }
+    }
+
     /**
      * 设置用例库状态。
      * Save lib state.