how to get all items of category with filtered condition

<?php require_once (JPATH_SITE.DS.'components'.DS.'com_flexicontent'.DS.'classes'.DS.'flexicontent.helper.php'); require_once (JPATH_SITE.DS.'components'.DS.'com_flexicontent'.DS.'classes'.DS.'flexicontent.fields.php'); require_once (JPATH_SITE.DS.'components'.DS.'com_flexicontent'.DS.'helpers'.DS.'permission.php'); require_once(JPATH_SITE.DS.'components'.DS.'com_flexicontent'.DS.'models'.DS.'category.php'); // Decide whether to show module contents $app = JFactory::getApplication(); $config = JFactory::getConfig(); $jinput = $app->input; $option = $jinput->get('option', '', 'cmd'); $view = $jinput->get('view', '', 'cmd'); // Your data $catid = 19; // Category id $start_at_item = 0; // First item to ge $items_limit = 100; // Number of items to get $orderby = 'rdate'; // Most recently created // Set and Backup HTTP REQUEST variables $saved_cid = $jinput->set('cid', $catid); $saved_option = $jinput->set('option', 'com_flexicontent'); $saved_view = $jinput->set('view', 'category'); $saved_limitstart = $jinput->set('limitstart', $start_at_item); $saved_limit = $jinput->set('limitstart', $items_limit); $saved_orderby = $jinput->set('orderby', $orderby); // Get/Create current category model ... according to configuration set above into the HTTP Request variables ... $cat_model = new FlexicontentModelCategory(); $category = $cat_model->getCategory($pk=null, $raiseErrors=false, $checkAccess=false); // Get current's view category parameters and force model to retrieve sub-category items $cat_params = $cat_model->getParams(); $cat_params->set('display_subcategories_items', 2); // Add your code // ... $items = $cat_model->getData(); // Restore HTTP REQUEST variables $jinput->set('cid', $saved_cid); // restore cid $jinput->set('option', $saved_option); // restore option $jinput->set('view', $saved_view); // restore view $jinput->set('limitstart', $saved_limitstart); // restore limitstart $jinput->set('limit', $saved_limit); // restore limit $jinput->set('orderby', $saved_orderby); // restore orderby ?>

$cat_params->set('display_subcategories_items', 2);