Via https://qtranslate-x.com/support/index.php?topic=371.0
Edit file in /wp-admin/nav-menus.php
line 56
//if ( isset( $_POST['nav-menu-data'] ) ) { << comment this
// $data = json_decode( stripslashes( $_POST['nav-menu-data'] ) ); << and this
if ( ! is_null( $data ) && $data ) {
foreach ( $data as $post_input_data ) {
// For input names that are arrays (e.g. <code>menu-item-db-id[3]</code>), derive the array path?keys via regex.
if ( preg_match( '#(.*)\[(\w+)\]#', $post_input_data->name, $matches ) ) {
if ( empty( $_POST[ $matches[1] ] ) ) {
$_POST[ $matches[1] ] = array();
}
// Cast input elements with a numeric array index to integers.
if ( is_numeric( $matches[2] ) ) {
$matches[2] = (int) $matches[2];
}
$_POST[ $matches[1] ][ $matches[2] ] = wp_slash( $post_input_data->value );
} else {
$_POST[ $post_input_data->name ] = wp_slash( $post_input_data->value );
}
}
//}
<< And This! for hide if
Good luck and thank you hakangoker — Wait new ver. of qTranslate X