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PO
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Id
13654440
data
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0
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0
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2012-11-30T23:02:28.523
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2012-11-30T23:02:28.523
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11355141
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text
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<p>I think I had a similar desire as you to select and only show a sub menu being just the children menu items from an existing wordpress menu. This can be done by editing the functions.php and adding a shortcode that has it's own walker class to target and display a submenu.</p> <h3>PHP code for "menu" shortcode and customized menu walker class (all goes in functions.php):</h3> <pre><code> //register menu shortcode add_shortcode('menu', 'shortcode_menu'); function shortcode_menu($args ) { //don't echo the ouput so we can return it $args['echo']=false; //in case menu isn't found display a message $args['fallback_cb']='shortcode_menu_fallback'; //check if showing a submenu, if so make sure everything is setup to do so if (isset($args['show_submenu']) && !empty($args['show_submenu'])) { if (!isset($args['depth'])) { $args['depth']=1; } $args['walker']=new Sub_Menu_Walker_Nav_Menu(); } $menu=wp_nav_menu( $args ); return $menu; } //message to display if menu isn't found function shortcode_menu_fallback($args ) {return 'No menu selected.';} //special walker_nav_menu class to only display submenu //depth must be greater than 0 //show_submenu specifies submenu to display class Sub_Menu_Walker_Nav_Menu extends Walker_Nav_Menu { function display_element( $element, &$children_elements, $max_depth, $depth=0, $args, &$output ) { if ( !$element ) return; $id_field = $this->db_fields['id']; $displaythiselement=$depth!=0; if ($displaythiselement) { //display this element if ( is_array( $args[0] ) ) $args[0]['has_children'] = ! empty( $children_elements[$element->$id_field] ); $cb_args = array_merge( array(&$output, $element, $depth), $args); call_user_func_array(array(&$this, 'start_el'), $cb_args); } $id = $element->$id_field; if ( is_array( $args[0] ) ){ $show_submenu=$args[0]['show_submenu']; }else $show_submenu=$args[0]->show_submenu; // descend only when the depth is right and there are childrens for this element if ( ($max_depth == 0 || $max_depth >= $depth+1 ) && isset( $children_elements[$id]) && $element->title==$show_submenu) { foreach( $children_elements[ $id ] as $child ){ if ( !isset($newlevel) ) { $newlevel = true; //start the child delimiter $cb_args = array_merge( array(&$output, $depth), $args); call_user_func_array(array(&$this, 'start_lvl'), $cb_args); } $this->display_element( $child, $children_elements, $max_depth, $depth + 1, $args, $output ); } unset( $children_elements[ $id ] ); } if ( isset($newlevel) && $newlevel ){ //end the child delimiter $cb_args = array_merge( array(&$output, $depth), $args); call_user_func_array(array(&$this, 'end_lvl'), $cb_args); } if ($displaythiselement) { //end this element $cb_args = array_merge( array(&$output, $element, $depth), $args); call_user_func_array(array(&$this, 'end_el'), $cb_args); } } } </code></pre> <h3>Display a submenu titled "About" from the "Main" menu (capitalization matters):</h3> <pre><code>[menu menu='Main' show_submenu='About'] </code></pre> <h3>Display the full "Main" menu:</h3> <pre><code>[menu menu='Main'] </code></pre> <p>For further reading/reference see <a href="http://wordpress.org/support/topic/wp_nav_menu-list-only-2nd-level-separate-submenu/page/2" rel="nofollow">this wordpress question</a>.</p>
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1. This table or related slice is empty.
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1. POWordPress wp_nav_menu specific sub menu only
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1. PTAnswer
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1. USsite
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