Similar to standard Japanese, 関西弁（かんさいべん） regularly omits particles when they are not needed. A common example of this is 思（おも）う being used instead of と思（おも）う, to convey that the speaker 'thinks' something.
In the case of nouns and な-Adjectives, which would usually require だ before と思（おも）う, や will be used instead.

• あの人（ひと）のことやから、明日（あした）雨（あめ）降（ふ）っても釣（つ）りに行（い）く思（おも）うわ。
  As for him, I think he will go fishing even if it rains tomorrow.
• あそこのお好（この）み焼（や）き屋（や）が一番（いちばん）美味（おい）しい思（おも）うで。
  I think the okonomiyaki place over there is the best.
• 大阪人（おおさかじん）は基本的（きほんてき）に親切（しんせつ）や思（おも）う。
  I think people from Osaka are generally friendly.
• それはエミコの教科書（きょうかしょ）や思（おも）う。
  I think that is Emiko's textbook.

It should be noted, however, that this omission of と is primarily used when people are speaking quickly.