Versuchen Sie wie folgt vorgehen: -
1)Create the new location for the core WordPress files to be stored (we will use /wordpress in our examples). (On linux, use mkdir wordpress from your www directory. You'll probably want to use "chown apache:apache" on the wordpress directory you created.)
2) Go to the General panel.
3) In the box for WordPress address (URL): change the address to the new location of your main WordPress core files. Example: http://example.com/wordpress
4) In the box for Site address (URL): change the address to the root directory's URL. Example: http://example.com
5) Move your WordPress core files to the new location (WordPress address).
6) Copy (NOT MOVE!) the index.php and .htaccess files from the WordPress directory into the root directory of your site (Blog address). The .htaccess file is invisible, so you may have to set your FTP client to show hidden files. If you are not using pretty permalinks, then you may not have a .htaccess file. If you are running WordPress on a Windows (IIS) server and are using pretty permalinks, you'll have a web.config rather than a .htaccess file in your WordPress directory. For the index.php file the instructions remain the same, copy (don't move) the index.php file to your root directory. The web.config file, must be treated differently than the .htaccess file so you must MOVE (DON'T COPY) the web.config file to your root directory.
7) go to index.php.... Change the following and save the file. Change the line that says:
require(dirname(__FILE__) . '/wp-blog-header.php');
auf die folgenden, mit Ihrem Verzeichnisnamen für die Wordpress Core-Dateien:
require(dirname(__FILE__) . '/wordpress/wp-blog-header.php');