How to call the balance in menu?

Currently no, there is no way to do this.

However, you should be able to use the JSON API to retrieve balance information and display it in any way you see fit using JavaScript.

See the get_coins_info call in:

https://www.dashed-slug.net/bitcoin-altcoin-wallets-wordpress-plugin/json-api/

This has now been implemented in 2.5.0.

Have a look at the release post for instructions:

https://www.dashed-slug.net/javascript-address-validators-menu-item-balances/

regards,
Alex

You are the best, bro! Thanks a lot!