one more thing..
with this code
<?php $field_id = 1598;
$field = get_post($field_id);
$field->desc = get_post_meta($field_id, 'bpge_field_desc', true);
$field->options = json_decode($field->post_content);
echo '<div class="field_data">';
if ( is_array($field->options) )
$data = implode(', ', $field->options);
else
$data = $field->post_content;
echo 'woj. ' . $data . '';
echo '</div>';?>
<?php bp_group_description_excerpt(); ?>
i am able to display content of the field 1958 at any page. but this field is global and each group has introduced diferent option, so how do i call this field in single group view?