PHP代码中的target = _blank

Noobie here. I need to insert target="_blank" into the following php code...any suggestions would be really appreciated :-)

<?php
                    echo wp_kses(
                        do_shortcode( "[cmo_footer_social][/cmo_footer_social]" ),
                        array(
                                'ul' => array (
                                        'class' => array()
                                ),
                                'i' => array (
                                        'class' => array()
                                ),
                                'li' => array ( ),
                                'a' => array (
                                        'class' => array(),
                                        'href' => array(),
                                )
                        )
                    );
                    ?>

wp_kses() filters content and keeps only allowable HTML elements. Depending on what the shortcode [cmo_footer_social] does, you may not need to filter the content at all (ie you may not need to use wp_kses()?).

The second parameter is allowed HTML tags, so just add target as suggested by @chris85, but without the value.

echo wp_kses(
    do_shortcode( "[cmo_footer_social][/cmo_footer_social]" ),
    array(
        'ul' => array (
                'class' => array()
        ),
        'i' => array (
                'class' => array()
        ),
        'li' => array ( ),
        'a' => array (
            'class' => array(),
            'href' => array(),
            'target' => array()
        )
    )
);