You need to check the source code of your PhpFox installation, you will notice that after the title, the author of your Site is PhpFox. If you like to change this value, you have to follow as:
Find a file named “phpfox.class.php” in /include/library/phpfox/phpfox
Find the “line 1007” and the content “$oTpl->setHeader(array(‘<meta name="author" content="phpFox" />’));”
Update the value "phpFox" with your own.