Filter Menu Items

If you’re using the built-in shortcodes, you need to modify the WP_Query arguments through it’s filters.

If you’re using the category shortcode, you can use this filter here https://github.com/alessandrotesoro/wp-restaurant-manager-lite/blob/master/includes/class-wprm-shortcodes.php#L178

If you’re using the full menu shortcode you can use this filter here https://github.com/alessandrotesoro/wp-restaurant-manager-lite/blob/master/includes/class-wprm-shortcodes.php#L259

Either way, both filters accept the WP_Query parameters explained here https://codex.ww.wp.xz.cn/Class_Reference/WP_Query#Custom_Field_Parameters

The meta field name is

_wprm_item_price

Please note i haven’t tested this.