How to open default browser from captive browser/portal on Android

[AC Question]

We provide wifi connection to our customer. We have enabled the captive portal for the wifi. Once the user connects to wifi, the captive browser pops up and displays our captive page. Once the user clicks on the captive page, the link should open in the user's default browser.

However, currently when the user clicks on the link on the captive page, it opens the link in the captive browser. How can we open the default browser when the user clicks the link on the captive page ?

We have this issue on the Android devices (like Samsung Galaxy s7).