Change Width of FB Widget

class avia_fb_likebox extends WP_Widget {

    static $script_loaded = 0;

    function __construct() {
        //Constructor
        $widget_ops = array('classname' => 'avia_fb_likebox', 'description' => __('A widget that displays a facebook Likebox to a facebook page of your choice', 'avia_framework') );
        parent::__construct( 'avia_fb_likebox', THEMENAME.' Facebook Likebox', $widget_ops );
    }

    function widget($args, $instance)
    {
        // prints the widget

        extract($args, EXTR_SKIP);
        if(empty($instance['url'])) return;
        $url        = $instance['url'];
        $title = empty($instance['title']) ? '' : apply_filters('widget_title', $instance['title']);
        $height     = 151;
        $faces      = "true";
        $extraClass = "";
        $style      = "";


        if(strpos($height, "%") !== false)
        {
            $extraClass = "av_facebook_widget_wrap_positioner";
            $style      = "style='padding-bottom:{$height}'";
            $height     = "100%";
        }


        echo $before_widget;

        if ( !empty( $title ) ) { echo $before_title . $title . $after_title; };

        echo "<div class='av_facebook_widget_wrap {$extraClass}' {$style}>";
        echo '<div class="fb-page" data-width="1210" data-href="'.$url.'" data-small-header="false" data-adapt-container-width="true" data-hide-cover="false" data-show-facepile="true" data-show-posts="false"><div class="fb-xfbml-parse-ignore"></div></div>';
        echo "</div>";
        echo $after_widget;
        add_action('wp_footer', array( $this,'fb_js' ));
    }



    function fb_js()
    {
        if ( function_exists('icl_object_id') ) {
            $locale = ICL_LANGUAGE_NAME_EN;
            $fbxml = @simplexml_load_file( AVIA_BASE . '/config-wpml/FacebookLocales.xml' );

            if(is_object($fbxml))
            {
                $langcode = array();
                foreach($fbxml as $loc) {
                    if($loc->englishName == $locale) {
                        $langcode = $loc->codes->code->standard->representation;
                    }
                }
            }
        }

        $langcode = function_exists('icl_object_id') && !empty($langcode) ? $langcode : get_locale();

        if(self::$script_loaded == 1) return;
        self::$script_loaded = 1;

        echo '
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/'. $langcode .'/sdk.js#xfbml=1&version=v2.7";
fjs.parentNode.insertBefore(js, fjs);
}(document, "script", "facebook-jssdk"));</script>';

    }


    function update($new_instance, $old_instance)
    {
        $instance = $old_instance;
        foreach($new_instance as $key=>$value)
        {
            $instance[$key] = strip_tags($new_instance[$key]);
        }

        return $instance;
    }

    function form($instance) {
        //widgetform in backend

        $instance = wp_parse_args( (array) $instance, array('url' => 'https://www.facebook.com/kriesi.at', 'title' => '') );
        $html = new avia_htmlhelper();


?>

        <p>
        <label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:', 'avia_framework'); ?>
        <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo esc_attr($instance['title']); ?>" /></label>
        </p>

        <p>
        <label for="<?php echo $this->get_field_id('url'); ?>"><?php _e('Enter the url to the Page. Please note that it needs to be a link to a <strong>facebook fanpage</strong>. Personal profiles are not allowed!', 'avia_framework'); ?>
        <input class="widefat" id="<?php echo $this->get_field_id('url'); ?>" name="<?php echo $this->get_field_name('url'); ?>" type="text" value="<?php echo esc_attr($instance['url']); ?>" /></label>
        </p>




    <?php
    }
}