Disable theme changing by removing submenu

Adding this snippet to the functions.php of your wordpress theme will remove the themes submenu from the admin menu. This is done based on user ID so you can remove the menu just for your clients while still keeping it available for you.

 

add_action( 'admin_init', 'slt_lock_theme' );
function slt_lock_theme() {
global $submenu, $userdata;
get_currentuserinfo();
if ( $userdata->ID != 1 ) {
unset( $submenu['themes.php'][5] );
unset( $submenu['themes.php'][15] );
}
}

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