index.php showing up in url

I’ve worked with WP for over 4 years now and I’ve never seen this.

Also I must note this is not on my server and it’s hosted by whomever the client bought the url from.

When I click on the navigation or even add a new page the url populates as such

http://www.richmondphoto.com/wordpress/index.php/about/

instead of

http://www.richmondphoto.com/wordpress/about/

I can’t find anything on this. Does anyone have any ideas? I’m assuming it something to do with how the host set this up but not even sure what was done wrong to tell them to fix.

Thank you