all links to _self instead of _blank?

It’s a strange request but one that is important to our site nonetheless. Our site feeds through to an “in-game” HUD, which is essentially a browser that has no “open new window or tab” capabilities and so all links must open in the same window.

Event Manager single event page links such as the “View more info” button and the Organiser website and social media links auto to target=” _blank”.

Please could you tell me where (in which files) I can find the relevant syntax so that I can change them all in a child page to target=”_self”.

Many thanks

The page I need help with: [log in to see the link]