As far as i know you cannot rename wp-admin. Many themes and plugin uses wp-admin in path. So if you rename it then all your plugins and themes will be broken. If you don’t want your users to access wp-admin then restrict it using .htacess If anyone access your wp-admin url redirect them to other page using .htaccess file. Only allow certain IPs to access wp-admin.
For example use this .htaccess code in your root of wp-admin (Not your wordpress root).
Create a new .htaccess file there and use this code.
AuthUserFile /dev/null
AuthGroupFile /dev/null
AuthName "Example Access Control"
AuthType Basic
<LIMIT GET>
order deny,allow
deny from all
allow from xx.xx.xx.xx
allow from xx.xx.xxx.xx
</LIMIT>
Replace xx.xx.xx.xx with your IP address. You can add more. Thereafter only you can access wp-admin. You can also use redirection plugin.
If you must want to rename wp-admin then proceed to read more but with extreme caution.
Just replace “wp-admin” with your keyword. Use this simple search and replace tool.
Here is the screenshot of that tool.
Warning: If you update your wordpress then your site will be broken. You should replace them in themes and plugins too. I highly NOT recommend this option. Use this option only if its mandatory. I’m not responsible for any problem that arises if you use this option.