<?php

$group_values = rwmb_meta( 'cf-cloneable_group' );
if ( ! empty( $group_values ) ) {
    foreach ( $group_values as $group_value ) {
        $value = isset( $group_value['cf-sub-taxonomy'] ) ? $group_value['cf-sub-taxonomy'] : '';
        //echo $value; // Display sub-field value
		//var_dump ($value);
    	 //echo $value[0];
			//echo get_term ( $value[0], 'cf-sub-taxonomy' ) ->name;
				foreach ( $value as $val ) {
				$term_name = get_term( $val )->name;
				echo $term_name;
				}
	}

}

?>

<?php

$group_values = rwmb_meta( 'cfa-group_zavodni_den' );
if ( ! empty( $group_values ) ) {
    foreach ( $group_values as $group_value ) {
        $value = isset( $group_value['cfa-trat'] ) ? $group_value['cfa-trat'] : '';
        //echo $value; // Display sub-field value
		//var_dump ($value);
    	 //echo $value[0];
			echo get_term ( $value[0], 'cfa-trat' ) ->name;
				//foreach ( $value as $val ) {
				//$term_name = get_term( $val )->name;
				//echo $term_name;
				//}
	}

}

?>

echo get_term($value[0], $taxonomy)->name