Force Show Category for All Display with PHP code

/* Force Show Category for All Display with PHP code */
function show_category_in_mobile_display_with_php_code() {
    if ( is_single() && is_singular() ) {
        ?>
        <style>
            /* Force Show Category for All Display */
            .entry-header .jeg_meta_category {
                display: unset!important;
            }
            @media only screen and (max-width : 568px) {
                .entry-header .jeg_meta_category {
                    display: unset!important;
                }
            }
            @media only screen and (max-width: 480px) {
                .entry-header .jeg_meta_category {
                    display: unset!important;
                }
            }
        </style>
        <?php
    }
}
add_action( 'wp_head', 'show_category_in_mobile_display_with_php_code' );