The documentation for the UI Node says you can change the main endpoint as below. I don't think you can change the address of the tabs.
The last post in here, with some modification might work for you - Configuring a dashboard tab in response to a URL - #6 by Nxito
The default url for the dashboard is based off your existing Node-RED httpRoot path with /ui added. This can be changed in your Node-RED settings.js file -
ui: { path: "ui" },
You can also add your own express middleware to handle requests by using the
ui: { middleware: your_function }
property in settings.js. For exampleui: { path: 'ui', middleware: function (req, res, next) { // Do something more interesting here. console.log('LOGGED') next() } },