Then you need to modify core.
In /oc-includes/osclass/helpers/hItems.php
below:
/***************
* META FIELDS *
***************/
find:
if(stripos(osc_field(osc_item_meta(), 's_value', ''),'http://')!==false || stripos(osc_field(osc_item_meta(), 's_value', ''),'https://')!==false) {
return '<a href="'.html_entity_decode(osc_field(osc_item_meta(), 's_value', ''), ENT_COMPAT, "UTF-8").'" >'.html_entity_decode(osc_field(osc_item_meta(), 's_value', ''), ENT_COMPAT, "UTF-8").'</a>';
} else {
return '<a href="http://'.html_entity_decode(osc_field(osc_item_meta(), 's_value', ''), ENT_COMPAT, "UTF-8").'" >'.html_entity_decode(osc_field(osc_item_meta(), 's_value', ''), ENT_COMPAT, "UTF-8").'</a>';
replace with:
if(stripos(osc_field(osc_item_meta(), 's_value', ''),'http://')!==false || stripos(osc_field(osc_item_meta(), 's_value', ''),'https://')!==false) {
return '<a href="'.html_entity_decode(osc_field(osc_item_meta(), 's_value', ''), ENT_COMPAT, "UTF-8").'"target="_blank" >'.html_entity_decode(osc_field(osc_item_meta(), 's_value', ''), ENT_COMPAT, "UTF-8").'</a>';
} else {
return '<a href="http://'.html_entity_decode(osc_field(osc_item_meta(), 's_value', ''), ENT_COMPAT, "UTF-8").'"target="_blank" >'.html_entity_decode(osc_field(osc_item_meta(), 's_value', ''), ENT_COMPAT, "UTF-8").'</a>';