Notice: Trying to get property of non-object  in /home/ahyuhgcw/public_html/app/design/frontend/smartwave/porto/template/catalog/category/category_nav.phtml on line 5

#0 /home/ahyuhgcw/public_html/app/design/frontend/smartwave/porto/template/catalog/category/category_nav.phtml(5): mageCoreErrorHandler(8, 'Trying to get p...', '/home/ahyuhgcw/...', 5, Array)
#1 [internal function]: cmpCatPosition('56', '36')
#2 /home/ahyuhgcw/public_html/app/design/frontend/smartwave/porto/template/catalog/category/category_nav.phtml(11): usort(Array, 'cmpCatPosition')
#3 /home/ahyuhgcw/public_html/app/design/frontend/smartwave/porto/template/catalog/category/category_nav.phtml(44): getChildrenCategoriesHtml(Object(Mage_Catalog_Model_Category))
#4 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/home/ahyuhgcw/...')
#5 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/smartw...')
#6 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#7 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#8 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract->toHtml()
#9 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Text_List->_toHtml()
#10 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Abstract.php(641): Mage_Core_Block_Abstract->toHtml()
#11 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Abstract.php(585): Mage_Core_Block_Abstract->_getChildHtml('left', true)
#12 /home/ahyuhgcw/public_html/app/design/frontend/smartwave/porto/template/page/2columns-left.phtml(52): Mage_Core_Block_Abstract->getChildHtml('left')
#13 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/home/ahyuhgcw/...')
#14 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/smartw...')
#15 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#16 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#17 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Model/Layout.php(555): Mage_Core_Block_Abstract->toHtml()
#18 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(390): Mage_Core_Model_Layout->getOutput()
#19 /home/ahyuhgcw/public_html/app/code/local/Smartwave/Ajaxcatalog/controllers/Catalog/CategoryController.php(111): Mage_Core_Controller_Varien_Action->renderLayout()
#20 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Smartwave_Ajaxcatalog_Catalog_CategoryController->viewAction()
#21 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('view')
#22 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#23 /home/ahyuhgcw/public_html/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#24 /home/ahyuhgcw/public_html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#25 /home/ahyuhgcw/public_html/index.php(90): Mage::run('', 'store')
#26 {main}