expand button improve

themes/beauty/views/site/index.php

@@ -223,6 +223,7 @@ eof;
         //分割目录和文件
         echo '</div>';
 
+        if (!empty($category['directories'])) {        //两级目录支持
             $arrowImg = $dir_ext_status == 'opened' ? 'arrow-up.svg' : 'arrow-down.svg';
             $btnTxt = $dir_ext_status == 'opened' ? '收拢' : '展开';
             echo <<<eof
@@ -231,6 +232,7 @@ eof;
     <button class="btn btn-default btn-xs btn-dir-ext" data-status="{$dir_ext_status}"><img src="/img/{$arrowImg}" alt="directory toggle"> <span>{$btnTxt}</span></button>
 </div>
 eof;
+        }
 
         echo '<div class="im_mainl row">';