Nav menu walker show: Warning: Illegal offset type

when i test the result on local, there was no error or warning show,

after i upload to server and the error show on page

Warning: Illegal offset type in isset or empty in /home1/kpadmin/etenbo.com/wp-includes/class-wp-walker.php on line 149

here is my website link http://etenbo.com

here is my code for walker

class SH_Nav_Menu_Walker extends Walker {

function start_el(&$output, $item, $depth, $args) {
$value = ”;
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$classes = in_array( ‘current-menu-item’, $classes ) ? array( ‘selectedlink’ ) : array();
$class_names = join( ‘ ‘, apply_filters( ‘nav_menu_css_class’, array_filter( $classes ), $item, $args ) );
$class_names = strlen( trim( $class_names ) ) > 0 ? ‘ class=”outer ‘ . esc_attr( $class_names ) . ‘”‘ : ‘class=”outer”‘;
$id = apply_filters( ‘nav_menu_item_id’, ”, $item, $args );
$id = strlen( $id ) ? ‘ id=”‘ . esc_attr( $id ) . ‘”‘ : ”;
$attributes = ! empty( $item->attr_title ) ? ‘ title=”‘ . esc_attr( $item->attr_title ) .'”‘ : ”;
$attributes .= ! empty( $item->target ) ? ‘ target=”‘ . esc_attr( $item->target ) .'”‘ : ”;
$attributes .= ! empty( $item->xfn ) ? ‘ rel=”‘ . esc_attr( $item->xfn ) .'”‘ : ”;
$attributes .= ! empty( $item->url ) ? ‘ href=”‘ . esc_attr( $item->url ) .'”‘ : ”;
$item_output = $args->before;
$item_output .= ‘<li ‘.$class_names.’ ><a’. $attributes . $id . $value . ‘>’;
$item_output .= ‘<span class=”word”>’;
$item_output .= $args->link_before . apply_filters( ‘the_title’, $item->title, $item->ID ) . $args->link_after;
$item_output .= ‘</span>’;
$item_output .= “\n”;
$item_output .= $args->after;
$output .= apply_filters( ‘walker_nav_menu_start_el’, $item_output, $item, $depth, $args );
}
}
class Footer_Nav_Menu_Walker extends Walker {

function start_el(&$output, $item, $depth, $args) {
$value = ”;
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$classes = in_array( ‘current-menu-item’, $classes ) ? array( ‘selectedlink’ ) : array();
$class_names = join( ‘ ‘, apply_filters( ‘nav_menu_css_class’, array_filter( $classes ), $item, $args ) );
$class_names = strlen( trim( $class_names ) ) > 0 ? ‘ class=”outer ‘ . esc_attr( $class_names ) . ‘”‘ : ‘class=”outer”‘;
$id = apply_filters( ‘nav_menu_item_id’, ”, $item, $args );
$id = strlen( $id ) ? ‘ id=”‘ . esc_attr( $id ) . ‘”‘ : ”;
$attributes = ! empty( $item->attr_title ) ? ‘ title=”‘ . esc_attr( $item->attr_title ) .'”‘ : ”;
$attributes .= ! empty( $item->target ) ? ‘ target=”‘ . esc_attr( $item->target ) .'”‘ : ”;
$attributes .= ! empty( $item->xfn ) ? ‘ rel=”‘ . esc_attr( $item->xfn ) .'”‘ : ”;
$attributes .= ! empty( $item->url ) ? ‘ href=”‘ . esc_attr( $item->url ) .'”‘ : ”;
$item_output = $args->before;
$item_output .= ‘<a’. $attributes . $id . $value . ‘>’;
$item_output .= $args->link_before . apply_filters( ‘the_title’, $item->title, $item->ID ) . $args->link_after;
$item_output .= ”;
$item_output .= “\n”;
$item_output .= $args->after;
$output .= apply_filters( ‘walker_nav_menu_start_el’, $item_output, $item, $depth, $args );
}
}

anyone can help me please……….~~~~~~~~~~~~