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I need to output different html code only for the first item of my submenus. How can I check in start_el() function if current item is first or not?

Example:

Menu voice 1
-- Sub 1
-- Sub 2
-- Sub 3
Menu voice 2
Menu voice 3
Menu voice 4

I would know when I'm in Sub1

UPDATE - I've solved using Static Var:

class my_walker_nav_menu extends Walker_Nav_Menu {
    static $count=0;
    function start_el(&$output, $item, $depth, $args) {         
        global $wp_query;

        $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 ) . '"';

        $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 .'>';

        if ($depth==0) self::$count=0;  // reset var when we are in first level


        if ($depth==1 && self::$count==1) {  // if we are in submenu and items count is 1...

            //your custom code              

        }

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

        $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );

        self::$count++;  // increase counter
    }


}
share|improve this question
    
There is a variable $depth, 0 is the parent, 1 is one level down and so forth. –  splashingpixels Sep 5 '13 at 14:14
    
Yes I know, but itsn't the problem. I don't want to know the dept of menu, but when I'm on the first item of submenu. For example I want to know when I'm on Sub1 in the following menu: Main 1 > Sub1 | Sub2 | Sub3 | Sub4 –  Supertramp Sep 5 '13 at 14:19
    
I don't think there is an elegant way to do this other than add a counter and reset the counter on every parent depth. So if ( $depth = 1 && $counter = 0 ) { // do something } –  splashingpixels Sep 5 '13 at 14:44
    
mmm it seems not so easy... which is the right way to declare var? –  Supertramp Sep 5 '13 at 15:20
    
THANK YOU SO MUCH! I spent 4 hours trying to do this yesterday, I didn't know about the self bit. –  Rev Jun 19 at 13:40
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