I need to run all of my .html files as .php files and I don't have time to change all of the links before our presentation tomorrow. Is there any way to "hack" this with my Apache server?
Create a .htaccess file at the root of your website and add this line:
[Apache2 @ Ubuntu/Debian: use this directive]
AddType application/x-httpd-php .html .htm
Or, from comment below:
AddType application/x-httpd-php5 .html .htm
If your are running PHP as CGI (probably not the case), you should write instead:
AddHandler application/x-httpd-php .html .htm