Wordpress meta_query / Sort array in php for autocomplete -

i have autocomplete plugin in wordpress website. results shown in alphabetical order (limit 10) query : 'foo' shows me :

a...foo.. a.. foo... a..... foo a. foo.... a.. foo... a.... foo. b.... foo. b. foo.... b.... foo. b. foo.... b.... foo. 

this php array

$suggestions[] = apply_filters( 'yith_wcas_suggestion', array(                         'id'    => $product->id,                         'value' => strip_tags($product->get_title()),                         'url'   => $product->get_permalink()                     ), $product ); 

i want have in suggestion array similar string "foo product"(which 43st in php array) , not other product contain word "foo".

how can sort $suggestions show closest value 'foo' in first result ?

thank much.