Hide a Field in Admin

#Using Prepare Hook

The most simple way to hide a field programmatically is to use the native acf/prepare_field hook. As explained in the ACF documentation, it is possible to hide a field by returning false. Here is a usage example:

add_filter('acf/prepare_field/name=my_field', 'my_prepare_field');
function my_prepare_field($field){
    
    // hide in backend
    if(is_admin()){
        return false;
    }
    
    // return normally
    return $field;
    
}

#Using Inline Field HookPRO

When registering field groups with add_local_field_group(), we can directly set a callback on the acf/prepare_field using the Inline Hooks (See documentation). Here is usage example:

$field = array(
    'label'     => 'My Text',
    'key'       => 'field_my_text',
    'name'      => 'my_text',
    'type'      => 'text',
    'callback'  => array(
    
        'prepare_field' => function($field){
            
            // hide in backend
            if(is_admin()){
                return false;
            }
            
            // return normally
            return $field;
            
        }
    
    )
);

#Using Advanced Settings

We can also hide a field from the admin directly from the Field Group UI, using the Advanced Settings. Usage example:

#Using Field Visibility WidgetPRO

A more simple solution is to use the Field Visibility Widget, which allow to hide a field directly from the Field Settings, using a dropdown.