Subnav Menu Wordpress

_subnav.scss

#subnav {
  li {
		list-style-type: none;
	}
	a {
		padding-left: 1em;
		padding-right: 1em;
		display: block
	}
	.menu-primary-container {
		> .menu {
			margin-left: 0;
		}
	}
	.menu {
		//Top-level subnav items
		> .sub-menu {
			margin-left: 0;
			> li {
				background: #f2f2f2;
				&.current-menu-parent, &.current-menu-item {
					background-color: #126090;
					> a {
						color: white;
					}
					ul {
						display: block;
					}
					&:hover{
						> a{
							color: white;
						}						
					}
				}
				&:hover{
					a {
						color: #126090;
					}
				}
				> a {
					text-transform: uppercase;
					color: #aaa;
					font-weight: 300;
					padding-top: .2em;
					padding-bottom: .2em;
				}
				//Submenu within subnav
				.sub-menu {
					display: none;
					margin-left: 0;
					li {
						padding-left: 1em;
						background: white;
						&:first-child{
							padding-top: .6em;							
						}
						&:last-child {
							padding-bottom: .2em;
						}
						// text-transform: none;
						a {
							color: black;
						}
						&.current-menu-item {
							position: relative;
							&:before {
								content: ">";
								position: absolute;
								left: 1em;
							}
							a {
								color: #126090;
								font-weight: 700;
							}
						}
						&:hover {
							color: #126090;
							&:before {
								content: ">";
								position: absolute;
								left: 1em;
							}
						}
					}
				}
			}
		}
	}
}

subnav_walker.php

// ********************
// Coopa Sub Nav Walker
// ********************

class sub_nav_walker extends Walker_Nav_Menu {
  var $found_parents = array();
function start_el(&$output, $item, $depth, $args) {
    	global $wp_query;
		//this only works for second level sub navigations
		$item_output = "";
		$parent_item_id = 0;
		$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
		$class_names = $value = '';

		$classes = empty( $item->classes ) ? array() : (array) $item->classes;	
		$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
		$class_names = ' class="' . esc_attr( $class_names ) . '"';
		#current_page_item

		// Checks if the current element is in the current selection
		if (strpos($class_names, 'current-menu-item')
			|| strpos($class_names, 'current-menu-parent')
			|| strpos($class_names, 'current-menu-ancestor')
			|| (is_array($this->found_parents) && in_array( $item->menu_item_parent, $this->found_parents )) ) {

			// Keep track of all selected parents
			$this->found_parents[] = $item->ID;

			//check if the item_parent matches the current item_parent
			if($item->menu_item_parent!=$parent_item_id){

				$output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $value . $class_names .'>';

				$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 .'>';
				$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
				$item_output .= '</a>';
				
				//$item_output .= '</li>';
				$item_output .= $args->after;
			}
			//}
			$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
		}
	}

  	function end_el(&$output, $item, $depth) {
	  // Closes only the opened li

	  if (strpos($class_names, 'current-menu-item')
			|| strpos($class_names, 'current-menu-parent')
			|| strpos($class_names, 'current-menu-ancestor')
			|| (is_array($this->found_parents) && in_array( $item->menu_item_parent, $this->found_parents )) ) {
	      $output .= "</li>\n";
    }
  }

  function end_lvl(&$output, $depth) {
    $indent = str_repeat("\t", $depth);
    // If the sub-menu is empty, strip the opening tag, else closes it
	//if($_SERVER['REMOTE_ADDR']=="81.187.108.150")echo("<pre>".print_r("---".trim($output)."---",1)."</pre>");
    if (substr($output, -22)=="<ul class=\"sub-menu\">\n") {
//      if($_SERVER['REMOTE_ADDR']=="81.187.108.150")echo("<pre>".print_r("empty",1)."</pre>");
      $output = substr($output, 0, strlen($output)-23);
    } else {
//      if($_SERVER['REMOTE_ADDR']=="81.187.108.150")echo("<pre>".print_r("closing",1)."</pre>");
      $output .= "$indent</ul>\n";
    }
    $output .= "";	
	$output = preg_replace('/>\s\s+</', '><', $output);
	$output = str_replace('<ul class="sub-menu"></ul>','',$output);

  }
}

// **(((((((((())))))))))**
// End Coopa Sub Nav Walker
// **(((((((((())))))))))**