To define this type of options you need to add a filter in the functions.php file of your template. Remember that the options defined through this filter disappear from admin panel and can no longer be edited by the user.

add_filter('quadmenu_developer_options', 'my_hook_developer_options_configuration', 1);

function my_hook_developer_options_configuration($options) {

    $options['quadmenu_viewport'] = 1;

    $options['quadmenu_styles'] = 1;

    $options['quadmenu_styles_normalize'] = 1;

    $options['quadmenu_styles_widgets'] = 1;

    $options['quadmenu_icons'] = 'fontawesome';

    $options['quadmenu_styles_pscrollbar'] = 1;

    return $options;
}

add_filter('quadmenu_developer_options', 'my_hook_developer_options_responsive', 1);

function my_hook_developer_options_responsive($options) {

    $options['gutter'] = '30';
    $options['screen_sm_width'] = '768';
    $options['screen_md_width'] = '992';
    $options['screen_lg_width'] = '1200';

    return $options;
}

add_filter('quadmenu_developer_options', 'my_hook_developer_options_social');

function my_hook_developer_options_social($options) {

    $options['quadmenu_social'] = array(
        array(
            'title' => 'Facebook',
            'icon' => 'fa fa-facebook-f',
            'url' => 'http://codecanyon.net/user/quadlayers/portfolio?ref=quadlayers',
        ),
        array(
            'title' => 'Twitter',
            'icon' => 'fa fa-twitter',
            'url' => 'http://codecanyon.net/user/quadlayers/portfolio?ref=quadlayers',
        ),
        array(
            'title' => 'Google Wallet',
            'icon' => 'fa fa-google-wallet',
            'url' => 'http://codecanyon.net/user/quadlayers/portfolio?ref=quadlayers',
        ),
        array(
            'title' => 'Github',
            'icon' => 'fa fa-github-alt',
            'url' => 'http://codecanyon.net/user/quadlayers/portfolio?ref=quadlayers',
        ),
        array(
            'title' => 'RSS',
            'icon' => 'fa fa-rss',
            'url' => 'http://codecanyon.net/user/quadlayers/portfolio?ref=quadlayers',
        ),
    );

    return $options;
}

<?php

add_filter('quadmenu_developer_options', 'my_hook_developer_options_css');

function my_hook_developer_options_css($css = '') {
 $css = '.custom {}'; // accepted values : valid css
 return $css;
}

add_filter('quadmenu_developer_options', 'my_hook_developer_options_themes', 1);

function my_hook_developer_options_themes($options) {

	$key1 = 'custom_theme_1';

    // Layout
    // -------------------------------------------------------------------------    
    $options[$key1 . '_layout'] = 'collapse';
    $options[$key1 . '_layout_offcanvas_float'] = 'right';
    $options[$key1 . '_layout_align'] = 'right';
    $options[$key1 . '_layout_sticky'] = 1;
    $options[$key1 . '_layout_sticky_offset'] = '90';
    $options[$key1 . '_layout_separator'] = '';
    $options[$key1 . '_layout_caret'] = 'show';
    $options[$key1 . '_layout_trigger'] = 'hoverintent';
    $options[$key1 . '_layout_classes'] = 'my_class';
    $options[$key1 . '_layout_breakpoint'] = '768';
    $options[$key1 . '_layout_hover_effect'] = '';
    $options[$key1 . '_layout_current'] = '';
    $options[$key1 . '_layout_animation'] = 'quadmenu_btt';

    // Navbar
    // -------------------------------------------------------------------------    

    $options[$key1 . '_navbar_logo'] = array(
        'url' => QUADMENU_URL . 'assets/frontend/images/logo.png'
    );
    $options[$key1 . '_navbar_height'] = '60';
    $options[$key1 . '_navbar_width'] = '260';
    $options[$key1 . '_navbar_toggle_icon'] = '#ffffff';
    $options[$key1 . '_navbar_toggle_hover'] = '#444444';
    $options[$key1 . '_navbar_background'] = 'color';
    $options[$key1 . '_navbar_background_color'] = array(
        'color' => '#333333',
        'alpha' => '1'
    );
    $options[$key1 . '_navbar_background_to'] = array(
        'color' => '#000000',
        'alpha' => '1'
    );

    $options[$key1 . '_navbar_background_deg'] = '17';
    $options[$key1 . '_navbar_sharp'] = array(
        'color' => '#ffffff',
        'alpha' => '0.5'
    );
    $options[$key1 . '_navbar_text'] = '#aaaaaa';

    $options[$key1 . '_navbar_logo_bg'] = array(
        'color' => '#ffffff',
        'alpha' => '0'
    );

    $options[$key1 . '_navbar_logo_height'] = '40';
    $options[$key1 . '_navbar_link'] = '#f1f1f1';
    $options[$key1 . '_navbar_link_hover'] = '#ffffff';
    $options[$key1 . '_navbar_link_bg_hover'] = array('color' => '#111111', 'alpha' => '1');
    $options[$key1 . '_navbar_scrollbar'] = '#fb88dd';
    $options[$key1 . '_navbar_scrollbar_rail'] = '#ffffff';
    $options[$key1 . '_navbar_button'] = '#ffffff';
    $options[$key1 . '_navbar_button_bg'] = '#fb88dd';
    $options[$key1 . '_navbar_button_hover'] = '#ffffff';
    $options[$key1 . '_navbar_button_bg_hover'] = '#000000';
    $options[$key1 . '_navbar_link_hover_effect'] = array('color' => '#fb88dd', 'alpha' => '1');
    $options[$key1 . '_navbar_link_margin'] = array('border-top' => '0', 'border-right' => '0', 'border-left' => '0', 'border-bottom' => '0');
    $options[$key1 . '_navbar_link_radius'] = 0;
    $options[$key1 . '_navbar_link_transform'] = 'uppercase';
    $options[$key1 . '_navbar_link_icon'] = '#eeeeee';
    $options[$key1 . '_navbar_link_icon_hover'] = '#ffffff';
    $options[$key1 . '_navbar_link_subtitle'] = '#eeeeee';
    $options[$key1 . '_navbar_link_subtitle_hover'] = '#ffffff';
    $options[$key1 . '_navbar_badge'] = '#fb88dd';
    $options[$key1 . '_navbar_badge_color'] = '#ffffff';
    $options[$key1 . '_layout_sticky_height'] = '60';
    $options[$key1 . '_layout_sticky_background'] = array('color' => '#ffffff', 'alpha' => '0');
    $options[$key1 . '_layout_sticky_logo_height'] = '40';

    // Dropdown
    // -------------------------------------------------------------------------
    $options[$key1 . '_dropdown_margin'] = 0;
    $options[$key1 . '_dropdown_radius'] = 0;
    $options[$key1 . '_dropdown_border'] = array('border-all' => '3', 'border-top' => '0', 'border-color' => '#000000');
    $options[$key1 . '_dropdown_background'] = array('color' => '#111111', 'alpha' => '1');
    $options[$key1 . '_dropdown_scrollbar'] = '#fb88dd';
    $options[$key1 . '_dropdown_scrollbar_rail'] = '#ffffff';
    $options[$key1 . '_dropdown_title'] = '#ffffff';
    $options[$key1 . '_dropdown_title_border'] = array('border-all' => '1', 'border-top' => '1', 'border-color' => '#fb88dd', 'border-style' => 'solid');
    $options[$key1 . '_dropdown_link'] = '#cccccc';
    $options[$key1 . '_dropdown_link_hover'] = '#fb88dd';
    $options[$key1 . '_dropdown_link_bg_hover'] = array('color' => '#000000', 'alpha' => '1');
    $options[$key1 . '_dropdown_link_border'] = array('border-all' => '1', 'border-top' => '1', 'border-color' => '#000000', 'border-style' => 'solid');
    $options[$key1 . '_dropdown_link_transform'] = 'none';
    $options[$key1 . '_dropdown_button'] = '#ffffff';
    $options[$key1 . '_dropdown_button_bg'] = '#fb88dd';
    $options[$key1 . '_dropdown_button_hover'] = '#ffffff';
    $options[$key1 . '_dropdown_button_bg_hover'] = '#000000';
    $options[$key1 . '_dropdown_link_icon'] = '#fb88dd';
    $options[$key1 . '_dropdown_link_icon_hover'] = '#a9a9a9';
    $options[$key1 . '_dropdown_link_subtitle'] = '#a0a0a0';
    $options[$key1 . '_dropdown_link_subtitle_hover'] = '#cccccc';

    return $options;
}