Fieldmanager_Group::form_element PHP Method

    public function form_element($value = NULL)
    {
        $out = '';
        $tab_group = '';
        $tab_group_submenu = '';
        // We do not need the wrapper class for extra padding if no label is set for the group
        if (isset($this->label) && !empty($this->label)) {
            $out .= '<div class="fm-group-inner">';
        }
        // If the display output for this group is set to tabs, build the tab group for navigation
        if ($this->tabbed) {
            $tab_group = sprintf('<ul class="fm-tab-bar wp-tab-bar %s" id="%s-tabs">', $this->persist_active_tab ? 'fm-persist-active-tab' : '', esc_attr($this->get_element_id()));
        }
        // Produce HTML for each of the children
        foreach ($this->children as $element) {
            $element->parent = $this;
            // If the display output for this group is set to tabs, add a tab for this child
            if ($this->tabbed) {
                // Set default classes to display the first tab content and hide others
                $tab_classes = array('fm-tab');
                $tab_classes[] = $this->child_count == 0 ? "wp-tab-active" : "hide-if-no-js";
                // Generate output for the tab. Depends on whether or not there is a tab limit in place.
                if ($this->tab_limit == 0 || $this->child_count < $this->tab_limit) {
                    $tab_group .= sprintf('<li class="%s"><a href="#%s-tab">%s</a></li>', esc_attr(implode(" ", $tab_classes)), esc_attr($element->get_element_id()), $element->escape('label'));
                } else {
                    if ($this->tab_limit != 0 && $this->child_count >= $this->tab_limit) {
                        $submenu_item_classes = array('fm-submenu-item');
                        $submenu_item_link_class = "";
                        // Create the More tab when first hitting the tab limit
                        if ($this->child_count == $this->tab_limit) {
                            // Create the tab
                            $tab_group_submenu .= sprintf('<li class="fm-tab fm-has-submenu"><a href="#%s-tab">%s</a>', esc_attr($element->get_element_id()), esc_html__('More...', 'fieldmanager'));
                            // Start the submenu
                            $tab_group_submenu .= sprintf('<div class="fm-submenu" id="%s-submenu"><div class="fm-submenu-wrap fm-submenu-wrap"><ul>', esc_attr($this->get_element_id()));
                            // Make sure the first submenu item is designated
                            $submenu_item_classes[] = 'fm-first-item';
                            $submenu_item_link_class = 'class="fm-first-item"';
                        }
                        // Add this element to the More menu
                        $tab_group_submenu .= sprintf('<li class="%s"><a href="#%s-tab" %s>%s</a></li>', esc_attr(implode(' ', $submenu_item_classes)), esc_attr($element->get_element_id()), $submenu_item_link_class, $element->escape('label'));
                    }
                }
                // Ensure the child is aware it is tab content
                $element->is_tab = TRUE;
            }
            // Get markup for the child element
            $child_value = isset($value[$element->name]) ? $value[$element->name] : null;
            // propagate editor state down the chain
            if ($this->data_type) {
                $element->data_type = $this->data_type;
            }
            if ($this->data_id) {
                $element->data_id = $this->data_id;
            }
            $out .= $element->element_markup($child_value);
            $this->child_count++;
        }
        // We do not need the wrapper class for extra padding if no label is set for the group
        if (isset($this->label) && !empty($this->label)) {
            $out .= '</div>';
        }
        // If the display output for this group is set to tabs, build the tab group for navigation
        if ($this->tab_limit != 0 && $this->child_count >= $this->tab_limit) {
            $tab_group_submenu .= '</ul></div></div></li>';
        }
        if ($this->tabbed) {
            $tab_group .= $tab_group_submenu . '</ul>';
        }
        // Return the complete HTML
        return $tab_group . $out;
    }