Changing wp-content to other name? Multisite set up

You can move the wp-content directory to a different location, which essentially renames it.

First, in your wp-config.php file, add this:

define( 'WP_CONTENT_DIR', $_SERVER['DOCUMENT_ROOT'] . '/folder/path/to/new/dir' );

And second, also in wp-config.php, add this:

define( 'WP_CONTENT_URL', 'http://yoursite.com/folder/path/to/new/dir');

You can read more about changing the wp-content dir on the Codex.