$self = preg_replace('|^.*/wp-admin/network/|i', '', $_SERVER['PHP_SELF']);

$self = preg_replace('|^.*/wp-admin/|i', '', $self);

$self = preg_replace('|^.*/mu-plugins/|i', '', $self);

$parent_file = apply_filters("parent_file", $parent_file); // For plugins to move submenu tabs around.

	global $self, $parent_file, $submenu_file, $plugin_page, $pagenow, $typenow;

		$aria_attributes = 'tabindex="1"';

		$submenu_items = false;

		if ( ! empty( $submenu[$item[2]] ) ) {

			$submenu_items = $submenu[$item[2]];

		if ( ( $parent_file && $item[2] == $parent_file ) || ( empty($typenow) && $self == $item[2] ) ) {

			$class[] = ! empty( $submenu_items ) ? 'wp-has-current-submenu wp-menu-open' : 'current';

		} else {

			$class[] = 'wp-not-current-submenu';

			if ( ! empty( $submenu_items ) )

				$aria_attributes .= ' aria-haspopup="true"';

		}

		if ( ! empty( $item[4] ) )

		$id = ! empty( $item[5] ) ? ' id="' . preg_replace( '|[^a-zA-Z0-9_:.]|', '-', $item[5] ) . '"' : '';

		if ( ! empty( $item[6] ) )

			$img = ( 'div' === $item[6] ) ? '<br />' : '<img src="' . $item[6] . '" alt="" />';

		$arrow = '<div class="wp-menu-arrow"><div></div></div>';

		$title = wptexturize( $item[0] );

		$aria_label = esc_attr( strip_tags( $item[0] ) ); // strip the comment/plugins/updates bubbles spans but keep the pending number if any

		if ( false !== strpos( $class, 'wp-menu-separator' ) ) {

			echo '<div class="separator"></div>';

		} elseif ( $submenu_as_parent && ! empty( $submenu_items ) ) {

			$submenu_items = array_values( $submenu_items );  // Re-index.

			$menu_hook = get_plugin_page_hook( $submenu_items[0][2], $item[2] );

			$menu_file = $submenu_items[0][2];

			if ( false !== ( $pos = strpos( $menu_file, '?' ) ) )

				$menu_file = substr( $menu_file, 0, $pos );

			if ( ! empty( $menu_hook ) || ( ('index.php' != $submenu_items[0][2]) && file_exists( WP_PLUGIN_DIR . "/$menu_file" ) ) ) {

				echo "<div class='wp-menu-image'><a href='admin.php?page={$submenu_items[0][2]}' aria-label='$aria_label'>$img</a></div>$arrow<a href='admin.php?page={$submenu_items[0][2]}'$class $aria_attributes>$title</a>";

				echo "\n\t<div class='wp-menu-image'><a href='{$submenu_items[0][2]}' aria-label='$aria_label'>$img</a></div>$arrow<a href='{$submenu_items[0][2]}'$class $aria_attributes>$title</a>";

		} elseif ( ! empty( $item[2] ) && current_user_can( $item[1] ) ) {

			$menu_hook = get_plugin_page_hook( $item[2], 'admin.php' );

			if ( false !== ( $pos = strpos( $menu_file, '?' ) ) )

				$menu_file = substr( $menu_file, 0, $pos );

			if ( ! empty( $menu_hook ) || ( ('index.php' != $item[2]) && file_exists( WP_PLUGIN_DIR . "/$menu_file" ) ) ) {

				echo "\n\t<div class='wp-menu-image'><a href='admin.php?page={$item[2]}' aria-label='$aria_label'>$img</a></div>$arrow<a href='admin.php?page={$item[2]}'$class $aria_attributes>{$item[0]}</a>";

				echo "\n\t<div class='wp-menu-image'><a href='{$item[2]}' aria-label='$aria_label'>$img</a></div>$arrow<a href='{$item[2]}'$class $aria_attributes>{$item[0]}</a>";

		if ( ! empty( $submenu_items ) ) {

			echo "\n\t<div class='wp-submenu'><div class='wp-submenu-wrap'>";

			echo "<div class='wp-submenu-head'>{$item[0]}</div><ul>";

			foreach ( $submenu_items as $sub_key => $sub_item ) {

				if ( ! current_user_can( $sub_item[1] ) )

				$aria_attributes = 'tabindex="1"';

				if ( false !== ( $pos = strpos( $menu_file, '?' ) ) )

					$menu_file = substr( $menu_file, 0, $pos );

				// Handle current for post_type=post|page|foo pages, which won't match $self.

				$self_type = ! empty( $typenow ) ? $self . '?post_type=' . $typenow : 'nothing';

				if ( isset( $submenu_file ) ) {

				} else if (

					( ! isset( $plugin_page ) && $self == $sub_item[2] ) ||

					( isset( $plugin_page ) && $plugin_page == $sub_item[2] && ( $item[2] == $self_type || $item[2] == $self || file_exists($menu_file) === false ) )

				) {

				if ( false !== ( $pos = strpos( $sub_file, '?' ) ) )

				$title = wptexturize($sub_item[0]);

				if ( ! empty( $menu_hook ) || ( ('index.php' != $sub_item[2]) && file_exists( WP_PLUGIN_DIR . "/$sub_file" ) ) ) {

					// If admin.php is the current page or if the parent exists as a file in the plugins or admin dir

					if ( (!$admin_is_parent && file_exists(WP_PLUGIN_DIR . "/$menu_file") && !is_dir(WP_PLUGIN_DIR . "/{$item[2]}")) || file_exists($menu_file) )

						$sub_item_url = add_query_arg( array('page' => $sub_item[2]), $item[2] );

						$sub_item_url = add_query_arg( array('page' => $sub_item[2]), 'admin.php' );

					$sub_item_url = esc_url( $sub_item_url );

					echo "<li$class><a href='$sub_item_url'$class $aria_attributes>$title</a></li>";

					echo "<li$class><a href='{$sub_item[2]}'$class $aria_attributes>$title</a></li>";

			echo "</ul></div></div>";

	echo '<li id="collapse-menu" class="hide-if-no-js"><div id="collapse-button"><div></div></div>';

	echo '<span>' . esc_html__( 'Collapse menu' ) . '</span>';

	echo '</li>';

<div id="adminmenuback"></div>

<div id="adminmenuwrap">

<div id="adminmenushadow"></div>

<ul id="adminmenu" role="navigation">

</div>