When you build a theme you can use this code for hide/remove WordPress Dashboard’s links. you have to add this code into your theme’s functions.php. After that you can write your own text with dashboard footer. Let’s Begin…

Here is the code;

function remove_footer_admin () {
    echo "Your own text";
}
add_filter('admin_footer_text', 'remove_footer_admin');

Don’t forget. You will add this code into your theme’s functions.php. Have a nice day!