В настройках ИБ
URL страницы информационного блока: #SITE_DIR#
URL страницы раздела: #SITE_DIR#/#SECTION_CODE_PATH#/
URL страницы детального просмотра:#SITE_DIR#/#ELEMENT_CODE#.html
../catalog/index.php
"SEF_FOLDER" => "/",
"DETAIL_STRICT_SECTION_CHECK" => "N",
"SEF_URL_TEMPLATES" => array(
"sections" => "index.php",
"section" => "#SECTION_CODE_PATH#/",
"element" => "#ELEMENT_CODE#.html",
"compare" => "compare.php?action=#ACTION_CODE#",
"smart_filter" => "#SECTION_CODE_PATH#/filter/#SMART_FILTER_PATH#/apply/",
)
../urlrewrite.php
array (
'CONDITION' => '#^/#',
'RULE' => '',
'ID' => 'bitrix:catalog',
'PATH' => '/catalog/index.php',
'SORT' => 500,
)